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 and control module Lancia Fiat Alfa Romeo TRW 51879973 18089310 18021710B 54086226B
Vendors's code: 51879973
Product code: 54086226B
Barcode:
Code 39:
ISBN:
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ABS pump and control module Lancia Fiat Alfa Romeo TRW 51879973 18089310 18021710B 54086226B
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£22.75
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from
£22.75
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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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An old ABS unit and four numbers - which of them should you compare?
A used, working, original ABS pump and control module unit. The listing title contains the brands Lancia, Fiat and Alfa Romeo. We do not state the model - selection by part numbers: 51879973, 18089310, 18021710B, 54086226B.
Lancia, Fiat, Alfa Romeo - ABS unit 51879973: what customers ask
- The listing has three brands. Does that mean the unit is for each of them?
- We do not claim that. We name the brands as in the title, and the numbers decide the selection.
- Which numbers do I need to have?
- All four are additional numbers given in the listing: 51879973, 18089310, 18021710B and 54086226B. The unit is used, working and original.
Four numbers to compare
- 51879973 - part number (OEM): 51879973
- 18089310 - number given in the listing: 18089310
- 18021710B - number given in the listing: 18021710B (in the title with a hyphen: 18021710-B)
- 54086226B - part number (OEM): 54086226B
The letter B at the end is part of the number - if you leave it out, you are comparing something else. We do not assign the numbers the role of pump or control module, so compare all four.
When this unit is sought
The reasons vary, but most often they are:
- the ABS light is on together with other warning lights,
- diagnostics point to damage to the ABS pump or control module,
- the anti-lock system stopped working after a power failure,
- the pump shows no sign of working during a brake test.
Before buying, read the fault codes and inspect the wheel sensors, connectors and fuses. After changing the unit, bleed the system. Remember that some modules require coding, which is best discussed with the workshop.
A conversation about numbers and brands
| Is this a part for my Fiat? |
|---|
| We do not promise that on the brand alone. Compare the four numbers in the listing with yours. |
| Why does number 18021710B have a hyphen in the title? |
| It is just the way it is written. We give the same number without the hyphen on the product page. |
| What if my part has only two of the four numbers? |
| Get in touch with those numbers. We will check how they relate to the listing. |
| Is the condition described honestly? |
| The unit is used, working and original; you will find the warranty period in the product features table. |
Send us the numbers from your old part and we will match them against the list above.
