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.
ABS pump Mercedes S-Class W220 Bosch A0044314612 0265202444
Vendors's code: 0265202444
Product code: A0044314612
Barcode:
Code 39:
ISBN:
€81.30
Price
€81.30
€100.00
Price
€100.00
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ABS pump Mercedes S-Class W220 Bosch A0044314612 0265202444
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Where to find number A0044314612 on Mercedes ABS pumps
Used ABS pump with control unit, number A0044314612, inspected before sale. Matched by the numbers on the block and sticker.
How to identify ABS pump A0044314612 for your Mercedes S-Class W220
ABS pump A0044314612 for Mercedes S-Class W220 is a used original module that regulates brake pressure when a wheel starts to lock up. It is matched by the numbers on its labels, not by the car model alone. According to the listing, the pump comes from the Mercedes S-Class W220 model.
Numbers to compare
Below are the numbers as they appear on the labels, together with the single-string form used in catalogues:
- A 004 431 46 12 (catalogue format: A0044314612), Mercedes number stamped on the hydraulic block,
- 0 265 202 444 (catalogue format: 0265202444), hydraulic block 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.
What can point to an ABS pump failure
- valve or pump motor faults are stored in the control unit memory,
- the ABS activates for no reason during normal braking,
- brake fluid leaks from the hydraulic block, which requires immediate action,
- the ABS switches itself off shortly after the engine is started.
ABS faults should not be ignored, because without anti-lock protection the car brakes less well on wet or slippery roads. Diagnosis and fitting are best left to a garage with a suitable scanner.
Questions and answers
| What is the difference between numbers A0044314612 and 0265202444? |
|---|
| One of the numbers is stamped on the hydraulic block, while the other comes from the module manufacturer or from the control unit sticker. When matching the part, compare all the numbers. |
| Are the make and model of the car enough to choose the part? |
| No. A single model comes with different versions of the module, depending on the engine, year of manufacture and drivetrain. The most reliable reference is the number on the original pump. |
| Do the brakes need bleeding after replacing the module? |
| If the brake lines are disconnected during fitting, the system must be bled. The fault codes in the control unit usually need to be cleared as well. |
| What condition is this pump in? |
| It is a used original part, inspected before sale. You will find the warranty period in the product features table. |
Not certain this is the right module? Send us the numbers from the label on your pump and we will help you compare them.
