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 TRW A1664310400 A1669016303
Vendors's code: A1664310400
Product code: FECE-42568
Barcode:
Code 39:
ISBN:
€447.15
Price
€447.15
€550.00
Price
€550.00
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ABS pump Mercedes TRW A1664310400 A1669016303
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Where to find number A1664310400 on Mercedes ABS pumps
Used ABS pump with control unit, number A1664310400, inspected before sale. Matched by the numbers on the block and sticker.
Mercedes ABS pump A1664310400: hydraulic module with control unit
This is a used original ABS pump with a control unit for Mercedes cars: an aluminium hydraulic block with valves and a pump motor, with the electronics bolted to it. The main number is A1664310400, and the other numbers from the labels are listed below. The listing does not state the car model or year, so we do not give them here and match the part by its numbers.
Part number A1664310400 and related numbers
Below are the numbers as they appear on the labels, together with the single-string form used in catalogues:
- A 166 431 04 00 (catalogue format: A1664310400), Mercedes number stamped on the hydraulic block,
- A 166 901 63 03 (catalogue format: A1669016303), Mercedes control unit number.
The full numbers matter, including their endings. If in doubt, send us a photo of your pump.
When an ABS module needs replacing
- the brake pedal pulses or feels uneven for no obvious reason,
- valve or pump motor faults are stored in the control unit memory,
- brake fluid leaks from the hydraulic block, which requires immediate action,
- on a slippery surface the wheels lock up noticeably sooner than they used to.
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
| Where do I find number A1664310400 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. |
| Which car model does this pump fit? |
| The listing does not state a model or year, so confirm compatibility with the number from the original pump in your car, or send us a photo of 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.
