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 Mercedes A6519003603 A6519013302
Vendors's code: A6519003603
Product code: 3B79-838C5
Barcode:
Code 39:
ISBN:
€813.01
Price
€813.01
€1,000.00
Price
€1,000.00
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Engine control unit Mercedes A6519003603 A6519013302
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€30.00
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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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When is engine control unit A6519003603 the right choice for Mercedes?
Engine control unit A6519003603, used and inspected. Compare the numbers with the original in your car.
Used engine control unit for Mercedes with number A6519003603
If the engine will not start or the engine warning light is on, one possible cause is the control unit. Control unit A6519003603 for Mercedes is a used original part, inspected before sale. 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.
Part numbers for A6519003603
The numbers from the listing, as written on the labels and as a single string:
- A6519003603, car manufacturer's original number,
- A6519013302, car manufacturer's original number.
Compare the numbers with the original control unit in your car, and if any of them differs, write to us before buying.
What can point to an engine control unit failure
- the engine will not start although the starter motor works and there is fuel,
- the car loses power or goes into limp mode,
- the engine starts and immediately stalls,
- fuel consumption rises for no obvious reason.
Before buying a control unit, read the fault codes with a diagnostic tester and check the power supply, the earth connections and the connector. Damaged sensors, wiring or fuses can cause similar symptoms, and in that case replacing the control unit will not help.
Questions and answers
| Are the make and model of the car enough to choose the part? |
|---|
| No. A single model comes with different versions of the control unit, depending on the engine, the software version and the equipment. The most reliable reference is the number on the original control unit. |
| 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. |
| How should I prepare for fitting the control unit? |
| Disconnect the battery, check the connector and the wiring, and after fitting read and clear the fault codes with a tester. Configuration is best carried out in a garage with suitable equipment. |
| Is this a new part? |
| No. We sell used original control units, each one inspected before sale. You will find the warranty period in the product features table. |
Not sure about the match? Send us a photo of the label on your control unit and we will check whether this part will fit.
