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 W212 Bosch A2124312012 0265236239 0265950972
Vendors's code: A2124312012
Product code: 0265950972
Barcode:
Code 39:
ISBN:
€81.30
Price
€81.30
€100.00
Price
€100.00
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ABS pump Mercedes W212 Bosch A2124312012 0265236239 0265950972
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Where to find number A2124312012 on Mercedes ABS pumps
Used ABS pump with control unit, number A2124312012, inspected before sale. Matched by the numbers on the block and sticker.
Mercedes W212 ABS pump A2124312012: hydraulic module with control unit
The hydraulic block and control unit of this ABS pump form a single module that works with the wheel speed sensors in Mercedes W212 cars. You will find number A2124312012 on the label, and the full set of numbers is given in the description below. According to the listing, the pump comes from the Mercedes W212 model.
Where to find the numbers on an ABS pump
You will find the numbers on the labels, while catalogues list them as a single string:
- A 212 431 20 12 (catalogue format: A2124312012), Mercedes number stamped on the hydraulic block,
- 0 265 236 239 (catalogue format: 0265236239), hydraulic block manufacturer's number,
- 0 265 950 972 (catalogue format: 0265950972), control unit number.
Compare the numbers with the original pump in your car, and if any of them differs, write to us before buying.
What can point to an ABS pump failure
- the ABS warning light comes on after the engine is started and stays on,
- the ABS stops working, although basic braking usually remains functional,
- the brake pedal pulses or feels uneven for no obvious reason,
- the ABS switches itself off shortly after the engine is started.
First check the wheel sensors, their wiring and the supply voltage. Only a fault code pointing to the module justifies replacing the pump. After fitting, clear the fault codes and, if necessary, bleed the brake system.
Questions and answers
| Where do I find number A2124312012 on my pump? |
|---|
| The numbers are stamped or printed on the aluminium hydraulic block, and the control unit has a separate sticker. Take a close-up photo of both places in good light. |
| Are the pump and the control unit sold separately? |
| In this listing they are a single module: a hydraulic block with the pump and valves, with the control unit attached to it. |
| Can I send a photo for a compatibility check? |
| Yes. Contact us and send a photo of the numbers on your original pump, and we will help you check whether this module will fit. |
| Is this a new part? |
| No. We sell used original modules, each one 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.
