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 Seat Leon 2.0 TDI Bosch 03G906021LL 0281013280
Vendors's code: 03G906021LL
Product code: 0281013280
Barcode:
Code 39:
ISBN:
€81.30
Price
€81.30
€100.00
Price
€100.00
Ask about the product
Engine control unit Seat Leon 2.0 TDI Bosch 03G906021LL 0281013280
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€30.00
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shipping
(Poland)
from
€30.00
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shipping
(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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The shipping cost applies to this product (in the selected variant - if applicable). It may change after adding other products to the cart.
How to check whether control unit 03G906021LL fits Seat Leon?
Used original engine control unit, number 03G906021LL, inspected before sale. Matched by the numbers in the listing.
Engine control unit 03G906021LL for Seat Leon: how to match it by part numbers?
Control unit 03G906021LL is a used original engine computer. It has been inspected before sale, and below you will find the complete list of numbers from the listing. The listing states that this control unit is for: Seat Leon. Engine given in the listing: 2.0 TDI.
Control unit numbers and markings
You will find the numbers on the label of the control unit, while catalogues list them as a single string:
- 03G906021LL, car manufacturer's original number,
- 0281013280, control unit manufacturer's number.
The ending of a number often indicates a different version of the control unit, so compare every character. If you are in doubt, write to us before buying.
Control unit variant
This listing is for a control unit in the following variant(s): Locked / Unlocked. We describe the differences between the variants (locked, unlocked, Virgin, IMMO OFF, Plug and Play, clone, full set) on the ECU preparation options page. Before buying, send us the numbers from the label and we will confirm which variant is available for that number.
When an engine control unit needs replacing
- the engine warning light comes on and does not go out,
- the engine idles unevenly or stalls for no obvious reason,
- control unit communication or power supply errors appear in the fault memory,
- starting is blocked by the immobiliser after the electronics have been replaced or repaired.
Similar symptoms also occur with faulty sensors, bad fuel or worn spark or glow plugs, so start with diagnostics and only then replace the electronics.
Questions and answers
| Where do I find number 03G906021LL on my control unit? |
|---|
| The numbers are on a sticker or printed on the housing of the control unit. Take a close-up photo of the label in good light so that all the characters can be read. |
| Will the control unit work after fitting without programming? |
| That depends on the variant of the control unit and on the car. Before buying, send us the numbers from the label and we will confirm what is needed. |
| Who makes this control unit? |
| The control unit is made by Bosch. The manufacturer's name does not change the numbers you should use to match the part. |
| What condition is this control unit in? |
| It is a used original part, inspected before sale. You will find the warranty period in the product features table. |
Want to check before you buy? Send a photo of the sticker on your control unit and we will check that the numbers match.
