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 Beetle 1.6 TDI PCR2.1 03L906023KE 5WP42965AA
Vendors's code: 5WP42965AA
Product code: 03L906023KE
Barcode:
Code 39:
ISBN:
€325.20
Price
€325.20
€400.00
Price
€400.00
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 Beetle 1.6 TDI PCR2.1 03L906023KE 5WP42965AA
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€30.00
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(Poland)
from
€30.00
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(Poland)
Price 30 euros applies shipments to 5 kg on worldwide. Above this weight, please contact us by email to check price
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How does the 03L906023KE ECU differ from 03L906023KC?
Both numbers refer to PCR2.1 ECUs for the Beetle 1.6 TDI, but the KE suffix denotes a different software or hardware version from KC, and the manufacturer's number here is 5WP42965AA. This unit is used and working, available locked or unlocked.
Engine Control Unit Volkswagen Beetle 1.6 TDI PCR2.1 03L906023KE 5WP42965AA
The 03L906023KE ECU is intended for the Volkswagen Beetle with the 1.6 TDI engine. It belongs to the PCR2.1 family of diesel engine ECUs and handles fuel injection and sensor monitoring. When it stops working, the Beetle usually will not start or will not connect to the diagnostic tool.
How to identify this ECU
- 03L906023KE – VW number from the sticker on the casing
- 1.6 TDI – engine we offer this module for
- PCR2.1 – ECU family (diesel engine)
- 5WP42965AA – ECU manufacturer's number in 5WP… format
When matching, what counts is the full VW number with the KE suffix. Number 5WP42965AA will help confirm that your module is identical.
Typical symptoms of a module fault
- limp mode and a noticeable loss of power with no sensor fault,
- intermittent communication with the immobiliser despite a correct key,
- no connection with the engine ECU on the diagnostic tool,
- a flashing glow plug warning light combined with starting problems.
It is a good idea to measure the voltages at the connector first and check the continuity of the wires to the sensors.
Locked or unlocked – which to choose?
There are two options to choose from. The unlocked version is prepared before dispatch, which usually takes 1–2 working days. The locked version reaches you with the data and immobiliser of the car it came from; unlocking, programming and adaptation are then carried out by a workshop.
Whether PIN code / CAR PASS, Virgin, IMMO OFF, auto programming or clone will be possible for the 03L906023KE ECU depends on its number, software and immobiliser. Before buying, ask which solution suits your car.
You will find a full description of the options here: ECU preparation options.
Questions and answers
| Is the ECU tested and covered by a warranty? |
|---|
| Yes, it is a working used module in good condition. You will find the warranty period in the product features table. |
| What should I send before ordering the unlocked version? |
| A photo of the label or all the numbers from your current ECU. Based on these, we will check which unlocking methods are possible. |
| How long does it take to prepare the unlocked version? |
| Usually 1–2 working days, after which we dispatch the ECU. |
| Are 5WP42965AA and 03L906023KE the same ECU? |
| Yes, they are two numbers of one module: 03L906023KE was assigned by Volkswagen, and 5WP42965AA by the ECU manufacturer. |
Not sure about the number? Write to us: contact@auto24parts.com.
