ECU 8450007865 for VAZ Vesta (1.6, 16V, manual transmission, Euro 5) M86

The electronic engine control unit (ECU) is a controller that is responsible for engine operation and controls all processes.

There are 3 types of control units installed on Lada Vesta and Lada XRay: M86 VAZ, M86 Itelma and EMS3125.

These control units differ greatly in quality of execution and content.

Electronic engine control units Lada Vesta and Lada XRay

The electronic engine control unit (ECU) is a controller that is responsible for engine operation and controls all processes.

There are 3 types of control units installed on Lada Vesta and Lada XRay: M86 VAZ, M86 Itelma and EMS3125.

These control units differ greatly in quality of execution and content.

Location

To carry out diagnostics on a computer, you must first find where the diagnostic connector is located. It serves to connect control devices and is connected to the electronic unit. The Vesta ECU diagnostic connector is located on the edge of the plastic panel under the mounting block and steering column. It is not closed and is easily accessible for use. This only plays into the hands of the hijackers.

M86 (VAZ and Itelma)

The control units M86 VAZ and M86 Itelma, as well as the software for them, were developed by OJSC AvtoVAZ and NPP Itelma, respectively.

M86 VAZ is installed on all Lada Vesta and Lada XRay with a 1.6 16V engine with index 21129.

M86 Itelma is installed on all Lada Vesta and Lada X-Ray with a 1.8 16V engine with index 21179.

The blocks are not interchangeable, despite their external similarity. But their weaknesses are the same.

The main disadvantage of the M86 block is the ease of car theft.

The unit can be programmed without an ignition key, which has a built-in immobilizer chip. That is, anyone can change the brain of a machine in 5 minutes. Therefore, it is very easy for a car thief to disable the standard fuel pump lock and drive off in an unknown direction.

If your car has an M86 ECU, then you must additionally protect the car. For example, install an additional security system or mechanical protection against theft. And also the M86 block is perfectly amenable to chip tuning and software changes.

Threat of theft

Car thefts are rampant these days, unfortunately. Moreover, it is the inexpensive cars that are the first to come under attack, especially those from class B, which, in fact, includes the Lada Vesta. The reason for this is the prevalence of such machines, as well as, as a rule, the lack of serious protective equipment.

In particular, in the video below, using the example of the Hyundai Solaris model, which is a direct competitor of Vesta, an example of car theft committed by a professional is demonstrated, with the car being broken into and the standard ECU being replaced with one flashed by the thieves (the factory immobilizer was removed from it). As you can see in the story, it took the master about a minute to do everything.

EMS3125

Siemens is developing software for this unit. Compared to the M86, the EMS3125 has more reliable software and, from a mechanical point of view, it is better made.

The Siemens unit can only be reprogrammed with the standard key in the ignition switch. But it’s still possible to steal a car, although it’s much more difficult to do than with the M86 block. The thief needs to replace the control unit under the hood with a pre-prepared one. A protective safe for the control unit can protect against such substitution.

This unit is installed on all vehicles with engine code H4M:

Diagnostic connector protection

Thieves can use the diagnostic connector to steal a car. They open the driver's door, connect their devices to the OBD, disable the protection, and start the engine without the ignition key. To protect the connector, you can block access to it.

The protection for the plug is like a steel box with holes for screws. It is made of two halves. One of them is removed to use the diagnostic connector. The protection is fixed through a bracket to the torpedo struts. The halves are fastened together with screws with heads for a secret key. Every year, experts develop new types of secret keys. This allows you to secure the product.

Which engine control unit is better?

We advise you to rely on personal preferences when choosing a car. But the car with the H4M engine type and the EMS3125 control unit looks slightly more advantageous. It is better protected from theft, and its software is more reliable.

In addition, H4M engines are made by the Renault-Nissan concern. So, for the same money you will get a more reliable car with an engine from Renault-Nissan and a control unit from Siemens.

Lada is a very popular car. And the more they buy, the more they steal. Therefore, it is better to take measures to further protect your car from theft.

With us you can install an anti-theft system, for example, Starline S96. Or any mechanical anti-theft devices - for example, an ECU protection safe or a Garant steering shaft lock. After such tuning, the car will be reliably protected from the vast majority of car thieves.

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Solution

It is worth noting that, unlike Solaris, it is a little more difficult to access the Vesta control unit, since it is covered on top by an air filter duct, and dismantling it will take time to get to the unit itself. However, there is nothing to rely on the air filter.

Naturally, all this can be avoided if the ECU is reliably protected. That is why installing 2 security measures in Vesta seems more than justified:

1. Protection of the Lada Vesta engine control unit;
2. Protection of the OBD Vesta diagnostic connector from theft (universal).

Buying these two accessories significantly increases your chances of emerging victorious in a fight with a car thief.

With such protection, the owner of Vesta can sleep much more peacefully.

Answers

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Lada (“Lada”) is a brand of cars produced by JSC AVTOVAZ. Previously, it was used only for export cars, and for the domestic market, cars were produced under the Zhiguli brand. In 2004, the management of AVTOVAZ announced the transition to the Latin alphabet for the official spelling of the names of all cars produced by the plant: Lada - instead of "VAZ" and "Lada".

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It’s clear what to do, let’s get to work!

We purchase the following components in the store:

Low frequency amplifier microcircuit TDA7560, without a letter code at the end of the name. Cost about 450 rub. Electrolyte with a capacity of 10,000 uF at 25 V with an operating temperature of 105 degrees. The radio is very hot when working. Cost about 100 rubles. Film capacitor with a capacity of 0.47 µF at 250 V, type K73-17. Cost about 20 rubles. We bought the components, remove the radio and take it to the desktop, where we will do the modernization.

This is what the radio looks like on the desktop, where we will solder the microcircuit and connectors.

And this is a marking plate, if anyone doesn’t know.

Let's disassemble the radio! This process did not cause any difficulties; we unscrewed the visible screws and that was it.

This is a view of the PCB with the top cover removed.

We disconnect the cable from the board and unscrew it from the case.

This is what the printed circuit board looks like.

And we will change these elements. The chip is circled in red, the electrolyte in yellow.

Firmware at home. Vesta SW 1.6 - ECU M86 FOR VAZ

The day has come when I finally have all the components for flashing the ECU of my car.

In general, I don’t lay any claim to any kind of discovery, this has been done a thousand times before me, the guys from the drive have it even described in more detail than mine, for example, here, but still. There are just a bunch of assembly diagrams, there is more than one article on the drive. For myself, I chose the simplest and (for me) cheapest option. I bought a K-line USB Adapter State, saving myself from problems with additional power. I bought it here here, the price is quite reasonable, it arrived in 5 days, through SDEK. All the fun amounted to 1020+250 delivery. I took the wires from the old PC power supply, and the pins from there, though they only fit on the thick terminals of the ECU, but it didn’t matter, I squeezed them a little with pliers and they are quite normally attached to a thin pin.

Connecting to the block

12. To flash the block, open a pre-prepared firmware file in HEX format. (there are instructions on how to do it in the archive with the file) 13. Click on the line with the range of addresses, then Select All, then Add Sel 14. Now, in order not to pour anything unnecessary into the block, on the right side click the SW Protect button, check the boxes opposite 16 sectors, starting from 0x00С40000 and up to 0х00С4F000 inclusive. Padlocks will appear opposite them, at the top of the list of files there is already one gray one, everything is fine as it should be. 15. Press the Program button.

We wait, we wait, we see the inscription success in English, it means everything is OK, we close everything in order and run to place the block strictly on 1 nut, because our hands are really itching to check whether IT works or not. What do we have in the end? I didn’t really like the firmware that was made for money, like 4500, it was ADACT dynamic. Everything seemed to be good on it, but it wasn’t exactly dynamic, and it was a little more fun than stock, plus it froze out detonation, like everyone else had when accelerating into tightness in 2.3 gears. I read the articles on the drive and decided to sew it myself, tried Euro 6, after reading this I tried two E6 firmwares, both worked, no errors, I was even a little surprised, I assumed that the 2nd DC was already dead, but no. Yes, the E6 firmware, in my opinion, is more vibrant than stock, but not as active as Adact. I drove the E6 for just a couple of days, reset the initialization block, taught it, everything was written as “here”. PURELY MY OPINION, I agree that the entire training procedure, of course, was not completed for me, but I didn’t like the firmware. Maybe, of course, I haven’t tried it, maybe I need to ride even longer, but no. The dullness when switching is less noticeable, but it is there, and I didn’t feel any “special” dynamics or lift from the bottom. Fuel, of course, is 95. In the end, I bought commercial firmware from the well-known MMK, this is not advertising at all, but why hide it if it is so. And it's a completely different matter. A description of the firmware, with analysis, is on the drive, I found it somewhere here. So far I like everything, the “lower classes” are now behind the scenes, it’s hot, and when the clutch is depressed, the revolutions rise. It’s too early to judge by consumption, but it’s already less. So we use it.

Source

Advantages of an auto scanner

What is the OBD diagnostic connector

“Scanmatik-2” was appreciated even by professional diagnosticians. Having tried this kit once, car enthusiasts were pleasantly surprised that for a relatively low price it allows you to work with a full fleet of domestic cars and an impressive part of foreign ones. When working with the diagnostic kit of this model, you can also use a wireless interface to connect the system to a computer (Bluetooth).

https://youtube.com/watch?v=Q5esXF84-Lk

The OBD-2 connector on Grant regularly supplies power to the diagnostic adapter. In extreme cases, the Scanmatik-2 adapter can be powered from the cigarette lighter. In general, the device is very convenient for performing diagnostic procedures yourself. It even has surge protection. If, for example, you apply current from the cigarette lighter when the system does not need it, nothing bad will happen.

Every device has pros and cons. Many car thieves know how to use the diagnostic connector for their own selfish purposes. As a rule, the diagnostic block is used by criminals to disable the standard immobilizer. A common solution to this problem is to replace the standard block with a “re-pinned” one, with a different arrangement of contacts.

The adapter consists of a “male” (fake connector) and a “female” (standard connector), which is previously removed. It will not be possible to connect standard diagnostic equipment to the new connector without such an adapter, but the chances of saving the car from theft are increased. That's all. Good luck!

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Seal

For me, the most difficult thing about a car is its “brains”. So I can fix everything myself, but I never get into this computer.

Well, at least the “brains” are not the same as, for example, in Toyota. Nothing can be done there at all without the permission of the BC.

It’s better not to get involved in this system yourself. It's easier to contact a specialist.

Oleg, essentially it’s like that in everything. If you don’t know something, then it’s better to run to a specialist.

BC STATE-1 stopped working. The diagnostician could be blocked or disabled. block? Anyone in the know, please tell me. Thank you.

Any system has “foolproofing”; since the 90s I have always repaired cars and computers (as far as understanding was enough) and have never broken anything, but I have found errors left by “professionals”

Please tell me where is the diagnostic connector for Lada Granta 2013?

Car driver test: what kind of driver are you? Car test for girls - you and the car Who is more important, you or your car?

DIY Lada Vesta diagnostics

Diagnostics by car models July 5, 2022 Rating:

Reading time

Difficulty of the material:

Electronic car diagnostics is an effective way to find out the condition of your car. Owners of the Lada Vesta now have access to the possibility of independent service, since the car uses a unit with a CAN communication bus. A basic scanner based on the ELM 327 is capable of providing detailed information on components, and diagnostic software can be found on the Internet.

The material is suitable for car owners: LADA VESTA, X-RAY

This instruction describes in detail the process of reading data from the ECU. The article also contains recommendations: which car scanner and program to choose for diagnosing a Lada Vesta of any year of manufacture. In the article you will find useful links to more detailed instructions and reviews of diagnostic equipment.

Author of the site elm327-obd2.ru

Computer diagnostics of Lada Vesta

To perform a service check of Lada components, there are two main diagnostic methods:

Attention:

The second method allows you to more thoroughly analyze the condition of the machine. Data is displayed in real time.

If there are detailed instructions for self-diagnosis in the car’s operating manual, then when diagnosing via the OBD2 connector you will need to select a scanner and programs and become familiar with the nuances of connecting the adapter and the operation of the diagnostic software.

Lada Vesta ECU and suitable scanners

Vesta electronic control received a CAN interface. Brains communicate with various systems through digitally encoded signals. Moreover, the Itelm M86 ECU is easily coordinated with third-party security devices (alarms), GPS trackers, and multimedia systems. The only requirement is the presence of an appropriate data bus.

For diagnostics, reading indicators and errors, ELM327 automotive scanners are used. They also use other multi-brand devices that operate using the OBD2 protocol and CAN bus:

Diagnostic capabilities of LADA VESTA systems:

ECU location:

On this vehicle, the ECU is located in the engine compartment, on the right side (view from the front). Fixed with several screws to the shock absorber shell. The wire connection blocks are located at the bottom of the block, but the ECU itself is rotated 90 degrees. The tires are secured with latches. To remove the chip, unlatch the lock and remove the block.

By the way, removing the ECU is only necessary when flashing the controller firmware.

Chip tuning and firmware of Vesta ECU:

The original firmware is tailored to harmonize engine emissions with EURO standards. Chip units have modified software that disables some sensors (lambda) for high dynamic performance. You can find out the firmware type through OpenDiag. How to flash the ECU will be discussed below.

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Description

Protection of the electronic engine control unit. Safe ECU. Car LADA VESTA

According to the traffic police, in 2022, RENAULT, LADA and KIA cars continue to lead in the number of thefts in the Russian Federation.

This situation is caused by the following reasons: 1. High liquidity of these cars. 2. Weak security of standard electronic systems against hacking.

Statistics on theft methods indicate that the first priority today is for the thief to replace the standard engine control unit with a previously hacked and prepared one.

Protection of the Electronic Control Unit (ECU) TM SHERIFF 1. Makes it impossible to replace the standard car ECU. 2. Difficulty disabling the standard immobilizer. 3.Reducing the risk of car theft.

A metal casing is attached to the factory holes in the car body using “breakaway” bolts with breakable heads, which structurally makes it impossible to remove the connectors and dismantle the factory electronic engine control unit.

Suitable for LADA VESTA and LADA VESTA CROSS cars from 2018 onwards, Engines 1.6 / 1.8 / AT-MT

Characteristics

Advantages: — Elimination of the possibility of replacing the ECU for theft. — Significant discounts when purchasing CASCO insurance. — The best price/quality ratio on the market. — Installation of the device does not violate the factory warranty. — During installation, no drilling of the body is required; the casing is attached to standard holes. — Each car model has its own ECU protection — Attractive appearance. — The design of the product is patented. — Steel 08 GOST 1058-88. — Increased resistance to corrosion.

Suitable for LADA VESTA and LADA VESTA CROSS cars from 2018 onwards, Engines 1.6 / 1.8 / AT-MT

Methods for diagnosing ECUs and errors on Lada Vesta via OBD2

Let's look at examples of analyzing machine systems in different ways.

Check Engine light on Vesta?

Detailed article on the causes of Check Engine and how to clear the Check. If your Check Engine light comes on, read this article immediately. The material explains what a Check Engine is, what to do if it appears, and how to remove this error yourself.

Is the Check Engine light on?

TOP 15 reasons why the Check Engine light comes on and ways to solve the problem. Read the article to solve the Check Engine problem.

Self-diagnosis:

To enter the BC diagnostic mode, hold down the top key and turn on the ignition.

Reviews of diagnostic scanners for LADA VESTA

Read detailed articles on the review of car scanners, including those compatible with LADA VESTA.

Reviews of OBD2 diagnostic car scanners

This section provides descriptions of diagnostic scanners and adapters. Before purchasing a scanner for your car, it is recommended that you read reviews of the most popular equipment models.

New software is written using programmers. There are open and closed ECUs.

Coming out as a replacement.

The Renault-Nissan alliance does not have a six-speed automatic or pre-selective transmission for state employees. Therefore, Lada was given a ready-made power unit, already familiar from other Renault models. Engine 1.6 with 113 hp. localized in Togliatti and digests AI-92 gasoline.

It is assisted by a Jatco JF015E variator with six virtual steps and a multi-layer metal belt. It has a two-stage planetary gearbox and a torque converter, which in the eyes of Tolyatti marketers was enough to dub the unit an automatic machine, and the new modification - Lada Vesta AT. But we will still call the transmission CVT, it’s more honest.

Previously, there were complaints about the variator regarding reliability. They say that now all the troubles have been eliminated, and the transmission lasts 150–200 thousand kilometers without problems. If so, then great.

When installing a CVT on the Logan Stepway, the designers had to sacrifice 20 mm of ground clearance. Xray Cross managed to maintain its fantastic 215 mm. What about Vesta? Yes, the bottom of the CVT crankcase is lower than that of a manual transmission. According to the official specifications, by 7 mm for the regular sedan and station wagon and by 4 mm for the Cross versions. But the engine crankcase is still lower! Therefore, the road and crossover Vestas retained their 178 and 203 mm under protection.

Instructions for diagnosing VESTA via OBD2 connector with your own hands via a laptop or smartphone

Determine where the OBD2 connector is located

Determine which scanner is suitable for your car

The selection of a scanner (adapter) for LADA VESTA depends on the ECU model, as well as the needs of the diagnostician / car owner.

To select diagnostic equipment, use the calculator: “Selecting a scanner for Lada Vesta”

Download the diagnostic program for the scanner

The diagnostic adapter requires software that can be installed on a laptop or smartphone/tablet. Auto scanners with their own software shell and display do not require software.

To select a program for the adapter, go to the section: “Programs”

Use the instructions and carry out diagnostics

When you purchase an adapter, instructions are included with the adapter. More detailed instructions on diagnostic car scanners and descriptions of their operation are posted in the section: “OBD2 car scanner reviews”

Identify errors and decipher them

Error codes and their interpretation are displayed in the scanner program interface. You can also study the complete database of errors for your car in the section: “OBD2 error codes for Lada Vesta”

Make repairs according to the error code

The unit is repaired according to the decoding of the error (problem) or contact a car service to eliminate a particular malfunction.

Check errors again

A good choice for a novice diagnostician

By following the link on the right you can get acquainted with the scanner for autodiagnostics “Scan Tool Pro”. This is an official dealer website that provides a 12 month warranty.

Warranty

• If the result does not suit you, within 14 days we will return your money and factory firmware;
• The cost of the service includes three free returns to the factory firmware and restoration of the updated one within one year (this may be useful when contacting a dealer);
• If the ECU (electronic control unit) fails during the programming process, STO VESTA takes responsibility for restoring this unit;
• STO VESTA has the right to refuse to install updated firmware in the event of a vehicle malfunction, or offer to perform the work without providing a guarantee;
• The warranty applies only to a technically sound vehicle and in the presence of a receipt and work order for the work performed;
• The warranty is also not provided when updating the firmware of cars older than five years.

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Frequently asked questions about car diagnostics via a computer or smartphone Lada Vesta

Let's look at the most common issues that arise when servicing this car.

Diagnostics of Lada Vesta sensors via OBD2

The machine's control system is designed in such a way that sensors monitor every moment of the engine's operation. Information is collected and analyzed by the ECU.

Lambda probe

The oxygen sensor is checked by the OpenDiag program and the adapter on the OBD2 block.

The schedule should not be jagged, with freezing peaks.

Speed ​​sensor

The element produces a pulse flow, which is converted into a current speed. The software displays the number of signal peaks, with an inverted value.

Idle speed sensor

The scanner displays the step position of the regulator:

Malfunctions of an element or circuit are indicated by errors: P0505, P0506-07, P1509, P1513-14.

Coolant temperature sensor

The diagnostic displays the coolant heating value. Output in converted form.

Engine temperature sensor

The element is associated with a pointer on the instrument panel. It works on a similar principle as DTOZH.

Oil pressure sensor

The ECU monitors the state of the unit using two parameters:

Errors P0522 and P0523 indicate problems.

Air pressure sensor

The service software displays a graph of DC voltage values ​​at the node. Options:

Circuit malfunctions are recorded by the ECU and entered into memory. OpenDiag reads the errors and displays their meaning.

Fuel pressure sensor

Regulates return pressure. Not diagnosable.

Throttle sensor

OpenDiag Pro displays the damper position as a percentage. Node error codes: P0122, P0123.

Air flow sensor

The diagnostic software displays the cell signal voltage:

At this value, the mass air flow sensor should be replaced.

Other sensors and their diagnostics via OBD2

The following elements can be analyzed:

Engine diagnostics via OBD2

The service capabilities of electronic components depend on the scanners and programs used. The OpenDiag application allows you to read engine readings at home, display recorded error codes and decipher them.

Service software allows you to monitor driving modes. Among the available ones: temperature, speed, throttle position, mixture quality and others.

For a detailed look at the M86 sensors and engine management system, check out the documentation below. “Euro-5 Electronic engine management system for 21129 cars of the LADA VESTA family with a controller – device and diagnostics.”

ABS diagnostics via OBD2 connector

The ABS system is diagnosed using a similar scheme. The connected scanner reads information from the brake control unit. Based on the data, a conclusion is made about the need for repairs.

The test will show the operation of the sensors, the condition of the circuit and contacts.

Intake solenoid valve

Malfunctions of this element can be detected by computer analysis using service software. The Lada Vesta ECU has 5 node error codes:

For diagnostics, connect the scanner to the OBD2 connector and run the program.

Messages 16

1 Topic by Axel 2016-01-06 19:21:49

• Axel
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Topic: ECU Lada Vesta

While searching for information on the electronic engine control system, I found information that the Lada Vesta has an M86 EURO-5 controller (ECU). Diagnostics of the electronic engine control system is quite simple, provided that you understand the operating principle of the ECM, have a clear understanding of how a good condition differs from a faulty one, and if you follow the recommended sequence of its implementation. It is important to have the necessary diagnostic tools. The ECM is capable of independently performing self-diagnosis to a certain extent. When a malfunction is detected, the ECM stores a fault code and may illuminate the malfunction indicator in the instrument cluster. When the Check-Engine indicator comes on, it is necessary to diagnose the engine and ECM as soon as possible. For those who independently diagnose the injector, you will need an OBD-II cable or OBD-II ELM327 Bluetooth Adapter. The diagnostic program can be found on the website Chiptuner.ru There are paid and free programs. The Lada Vesta diagnostic connector is located next to the hood opening lever under the steering column on the left.

Diagnostic connector

I don’t know how well thought out the location of the controller under the hood is, but there is a possibility of dirt and water getting through the connectors of the controller harnesses. On previous versions of Lada, all ECUs were located under the glove compartment. Time of use will show whether this is a disadvantage or an advantage.

Electronic control unit Lada Vesta

2 Reply from Gosha 2016-01-06 19:44:15

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Re: Lada Vesta ECU

On Kia the ECU is located under the hood. and everything is fine. And on Kalina, antifreeze from the stove radiator flooded the brains.

3 Reply from gamer 2016-01-06 19:48:18

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Re: Lada Vesta ECU

If the block is sealed enough, then there is no problem.

4 Reply from vishnevskysergey 2016-01-06 20:06:52

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Re: Lada Vesta ECU

I don’t know how well thought out the location of the controller under the hood is, but there is a possibility of dirt and water getting through the connectors of the controller harnesses.

Considering that a lot of dirt flies under the hood (through the lock), something needs to be done about it. I think it would be better to make an additional seal on the hood, especially in the lock area.

5 Reply from Fan 2016-01-06 20:17:10

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Re: Lada Vesta ECU

I will install an additional seal immediately upon arrival home. In general, the ECU is positioned correctly, the slope of the harnesses goes down. There was a problem with the Grants - some of the ECUs were flooded, even though they were in the cabin. Moisture got in through the harness from the engine compartment, and the connectors were with the wires facing up. Some turned the ECU over, some insulated it. I'm nothing. In Kaliny it was even worse - the ECU was located under the heater radiator, the slightest leak, condensation and it would flood. I think in Vesta you can additionally coat the inputs of the harnesses into the pads with silicone sealant. Everything else there is waterproof.

6 Reply from Lumi 2016-01-07 10:55:01

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Re: Lada Vesta ECU

Considering that a lot of dirt flies under the hood (through the lock), something needs to be done about it.

Renault Megane, there is no hood seal at all, the ECU is located under the hood, all flights are normal, I have not seen or heard any complaints related to dirt getting in.