A faulty transmission control module (TCM) most often causes limp mode with the gearbox stuck in one gear, harsh jolts when you select D or R, erratic gear changes, flashing PRND letters and a gearbox or engine warning light. However, the same symptoms are often caused by a low gearbox oil level, a weak battery, a poor earth or a faulty sensor. To test a transmission control module, start by checking the battery and reading the fault codes with a diagnostic tool that can talk to the gearbox control unit, then check the power supply, the connector, the oil and the live data. Below we explain the symptoms, the diagnostic steps and what the most common fault codes mean.
Engine Control Unit Volkswagen, Audi A3 Bosch 038906018AK 0281001852
Vendors's code: 0281001852
Product code: 0281001852
Barcode:
Code 39:
ISBN:
€121.95
Price
€121.95
€150.00
Price
€150.00
Select a product option:
Individual variants may differ in price
product option
Important: Depending on the ECU type and vehicle model, not all of the options listed below may be available.
To select the correct option for your vehicle and ECU, please contact us before purchasing:
contact@auto24parts.com
1. Locked
This option is intended for professional workshops with the required specialist equipment and technical knowledge.
The ECU has been removed from a vehicle intended for recycling and still contains the immobilizer data and other information from the previous vehicle. Before it can be used in another car, it must be unlocked and then programmed using specialist automotive diagnostic equipment.
2. Unlocked
Several preparation methods may be available. The possible options depend on the ECU type, vehicle model and immobilizer system. Please contact us before purchasing, as some preparation methods are not available for every ECU.
Our electronics specialists can prepare the ECU in one of the following ways:
a) ECU with PIN code (Car Pass)
The PIN code is supplied, but programming with a suitable diagnostic tool is still required. After installing the ECU, it must be reset using the supplied PIN code and then programmed to the vehicle’s immobilizer system.
b) VIRGIN ECU
The data from the previous vehicle is removed and the ECU is restored to a clean, factory-like state. After installation, it must be programmed to the vehicle using a compatible specialist diagnostic tool. Unless another preparation method is specified in the product description, this is the standard unlocking option for most of our ECUs.
c) Plug & Play – IMMO OFF
The immobilizer function is disabled in the ECU. After installation, the engine can start without additional immobilizer programming. Please note that the vehicle will no longer have an active immobilizer function, and an immobilizer warning light or fault code may remain, depending on the vehicle model.
d) Plug & Play – Automatic Programming
After installation, the ECU automatically learns and saves the required vehicle data. No additional programming is normally required.
e) Plug & Play – 1:1 Clone
The data from your original ECU is copied to another fully functional ECU. The cloned unit is then ready for installation without additional programming.
You must send us your original ECU so that we can transfer its data to the replacement unit.
The original ECU must have working communication with the vehicle, a diagnostic tool or our programming equipment. If the required data cannot be read, a complete 1:1 clone may not be possible.
3. Complete Plug & Play Set
A complete matched set containing the ECU, immobilizer components and all other parts required to start the vehicle without additional programming. All components supplied in the set must be installed in the vehicle.
Important:
Dispatch time depends on the selected option. If an unlocked or specially prepared version is ordered, the preparation service usually requires an additional 1–2 business days.
Ask about the product
Engine Control Unit Volkswagen, Audi A3 Bosch 038906018AK 0281001852
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What does number 28SA3735 on ECU 038906018AK mean?
28SA3735 is the Bosch software number. Together with VW number 038906018AK and Bosch number 0281001852, it lets you identify this used, working engine ECU for Volkswagen and Audi A3 vehicles precisely.
Engine Control Unit Volkswagen, Audi A3 Bosch 038906018AK 0281001852
You will find three numbers on the label of this ECU, and one of them – 28SA3735 – identifies the Bosch software. The module has VW part number 038906018AK and Bosch number 0281001852 from the diesel ECU series. According to our records, it was used in the Audi A3 and in Volkswagen vehicles. It is used, in working order and in good condition.
Numbers on the label
- 038906018AK – VW part number
- 0281001852 – Bosch number, shown on the sticker as 0 281 001 852
- 28SA3735 – Bosch software number
The letters AK at the end of the VW number denote the software and hardware version. If your module also shows a software number, compare it with 28SA3735.
Symptoms of ECU failure
- the engine will not start despite a good power supply,
- no communication with the module,
- reduced power in limp mode,
- intermittent running and the engine cutting out.
First rule out problems with the power supply, earth and module connector. On older vehicles, it is also worth checking the wires around the ECU for chafing and the connector pins for corrosion, as both problems produce similar symptoms.
How we can prepare the ECU
The unlocked version is prepared before dispatch, usually within 1–2 working days. The locked version reaches you with the data and immobiliser of the previous vehicle – this is the choice for workshops that unlock, program and match ECUs themselves.
Not every method (PIN / CAR PASS, Virgin, IMMO OFF, auto programming, cloning) is possible – it depends on the number, software and immobiliser. Please ask before buying. Details: ECU preparation options.
Questions and answers
| Does the software number have to match? |
|---|
| A match with 28SA3735 makes choosing easier. The deciding factor, above all, is number 038906018AK. |
| Which Volkswagen does the module fit? |
| We do not state the VW model – compatibility is decided by the numbers on the label. |
| What condition is the ECU in? |
| It is a used part, in working order and in good condition. You will find the warranty period in the product features table. |
Send the numbers from your ECU to contact@auto24parts.com.
