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.
Comfort control module Audi A4 Cabrio 8H0959255
Vendors's code: 8H0959255
Product code: 8H0959255
Barcode:
Code 39:
ISBN:
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Part number 8H0959255 - is it the right choice?
Used, working part: comfort control module for Audi A4 Cabrio - numbers 8H0 959 255 / 8H0959255. Before ordering, check the numbers on the label of the part removed from your car.
Comfort control module Audi A4 Cabrio
The comfort control module is an electronic body module that handles small comfort functions in the car. This listing applies to: Audi A4 Cabrio. The part is used, working and in good condition.
What a fault looks like
- door signalling works incorrectly,
- the interior lighting does not switch off,
- the battery drains overnight for no obvious reason,
- nothing happens when settings are changed.
Before buying, make sure the cause is not the power supply or wiring, and only then replace the module.
Role of the part in the car
A module failure is often mistaken for faulty individual consumers: when several unrelated functions stop working at once, it is worth checking the module as well.
Fitment
Compare number 8H0 959 255 in full with the number on your part. Different versions were fitted to the same models, so the number decides, not the model alone.
Part markings
- 8H0 959 255 / 8H0959255 - VAG group number (OEM)
Application according to the listing
- Audi A4 Cabrio - model
Questions before buying
| Where can I find the number on the part? |
|---|
| The number is on the label or housing, usually visible after removing the part from the car. If you cannot read it, send us a photo. |
| Can a part with a different number fit as well? |
| Sometimes it can, but we do not assume that listings are interchangeable. Compare all numbers with the label on your part or ask us. |
| What if I cannot see my number in the description? |
| Write to us and give the number from your part. We will check whether we have it in stock, also in another listing. |
Write to contact@auto24parts.com with the model, year and the number from your part - we will check the fitment.