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 Virgin Mercedes A6429004301 0281018855
Vendors's code: 0281018855
Product code: 5C81-98973
Barcode:
Code 39:
ISBN:
$493.65
Price
$493.65
$607.20
Price
$607.20
Ask about the product
Engine control unit Virgin Mercedes A6429004301 0281018855
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$30.36
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from
$30.36
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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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The shipping cost applies to this product (in the selected variant - if applicable). It may change after adding other products to the cart.
Will engine control unit A6429004301 fit your Mercedes?
Used original engine control unit, number A6429004301, inspected before sale. Matched by the numbers in the listing.
What does number A6429004301 mean on Mercedes engine control units?
This used engine control unit has the main number A6429004301 and comes from Mercedes cars. Whether it fits is decided by comparing all the numbers with the original part in your car. The listing does not state the car model or year, so we do not give them in the description and match the part by its numbers. The listing also gives the markings CR60.20. They help tell the control unit versions apart, but the full part number is what decides compatibility.
Part numbers for A6429004301
You will find the numbers on the label of the control unit, while catalogues list them as a single string:
- A6429004301, car manufacturer's original number,
- 0281018855, control unit manufacturer's number.
Matching by number is more reliable than matching by car model. Compare all the numbers and ask us if any of them does not match.
Control unit variant
This listing is for a control unit in the following variant(s): VIRGIN. 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.
In the Virgin version, the control unit has been cleared of data from the previous vehicle and has not yet been assigned to a new car. After fitting, it has to be programmed or adapted.
Symptoms of a faulty engine control unit
- the engine idles unevenly or stalls for no obvious reason,
- the car loses power or goes into limp mode,
- the radiator fan or other electrical components do not work properly,
- 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
| Does a lit engine warning light always mean a faulty control unit? |
|---|
| No. Read the fault codes first, because the cause may be a sensor, the wiring or the power supply. |
| What do the markings CR60.20 in the listing mean? |
| They are markings of the version or type of the control unit. They help tell the units apart, but the full part number is what decides compatibility. |
| What should I do if the ending of my number is different? |
| The ending of a number often indicates a different version of the control unit, so do not order the part without confirmation. Send us the number from the label on your control unit. |
| 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. |
If the numbers on your control unit differ from those given, write to us. We will check whether the right version is available in our range.
