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 BMW Z4 Bosch 6791486 6768550 0265236034 0265950767
Vendors's code: 6791486
Product code: 0265236034
Barcode:
Code 39:
ISBN:
£154.89
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£190.51
Price
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ABS pump BMW Z4 Bosch 6791486 6768550 0265236034 0265950767
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What does number 6791486 on an ABS pump mean?
Used original ABS module with number 6791486 for BMW Z4. Confirm compatibility with the number from your original pump.
BMW Z4 ABS pump 6791486: hydraulic module with control unit
This module is made by Bosch. ABS pump 6791486 is sold together with its control unit, just as it is fitted to BMW cars. According to the listing, the pump comes from the BMW Z4 model.
Numbers and markings on the ABS pump
The numbers as written on the labels and as a single string, the way catalogues list them:
- 6768550, BMW number in short form, without the group prefix,
- 6791486, BMW number in short form, without the group prefix,
- 0 265 236 034 (catalogue format: 0265236034), hydraulic block manufacturer's number,
- 0 265 950 767 (catalogue format: 0265950767), 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
- valve or pump motor faults are stored in the control unit memory,
- the pump motor switches on at unusual moments or runs louder than usual,
- the ABS activates for no reason during normal braking,
- brake fluid leaks from the hydraulic block, which requires immediate action.
It is worth reading the fault codes and checking the sensor wiring before replacement. Fitting and bleeding the brake system are usually carried out by a garage with the right equipment.
Questions and answers
| What is the difference between numbers 6791486 and 6768550? |
|---|
| The module carries several numbers, because it is identified both by the car brand and by the manufacturer of the block and control unit. When matching the part, compare all the numbers. |
| 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. |
| 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. |
Want to check before you buy? Send a photo of the block and sticker on your ABS pump and we will check that the numbers match.
