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 Polo 6R 1.2 TDI Delphi 03P906021B 28271598
Vendors's code: 28271598
Product code: 28271598
Barcode:
Code 39:
ISBN:
€162.60
Price
€162.60
€200.00
Price
€200.00
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 Polo 6R 1.2 TDI Delphi 03P906021B 28271598
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Shipping
from
€30.00
-
shipping
(Poland)
from
€30.00
-
shipping
(Poland)
Price 30 euros applies shipments to 5 kg on worldwide. Above this weight, please contact us by email to check price
Shipping cost for the selected product
The shipping cost applies to this product (in the selected variant - if applicable). It may change after adding other products to the cart.
How can I check whether the Delphi 28271598 ECU will fit your Polo 6R?
Compare both numbers with the label: Delphi 28271598 and VW number 03P906021B. This fully working module comes from a 2010 Polo 6R 1.2 TDI.
Engine Control Unit Volkswagen Polo 6R 1.2 TDI Delphi 03P906021B 28271598
A 2010 Polo 6R with the 1.2 TDI engine – that is where this Delphi ECU numbered 28271598 comes from. The VW part number is 03P906021B, but on its own it is not enough for matching, because it appears with different Delphi numbers. The module calculates the fuel quantity and controls boost, and when it stops working the engine usually will not start at all.
Numbers on the label
- 03P906021B – Volkswagen part number; the letter B denotes the version
- 28271598 – Delphi number of this unit
Check that your module shows exactly Delphi number 28271598. If the VW number matches but the Delphi number is different, send us a photo – we will assess whether this ECU can replace it.
Symptoms worth knowing
- the 1.2 TDI engine will not start,
- engine warning light and limp mode with no sensor at fault,
- communication with the module dropping out,
- failure after a voltage spike in the electrical system.
First inspect the connector and check the power supply and earths. Also read the fault codes – they will help you establish whether the module is to blame or, for example, a sensor or a wire in the engine wiring loom.
Available ECU versions
Locked version: the data and immobiliser of the Polo the module came from; for workshops that will unlock, program and adapt it themselves. Unlocked version: prepared by us before dispatch, usually within 1–2 working days.
Which method – PIN / CAR PASS, Virgin, IMMO OFF, auto programming, clone – is possible depends on the part number, software and immobiliser. Please ask before you buy. Details: engine control unit options.
Questions and answers
| Are 03P906021B ECUs with different Delphi numbers interchangeable? |
|---|
| Do not assume so. Compare Delphi number 28271598 or send us a photo of the label. |
| Will the locked version work straight away? |
| No, it needs to be unlocked, programmed and adapted to the immobiliser. |
| What condition is this ECU in? |
| It is a used, fully working part in good condition. You will find the warranty period in the product features table. |
Send questions about matching to contact@auto24parts.com together with the numbers from the label.
