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 Skoda Octavia Volkswagen Golf H34S0803 1K0937049N
Vendors's code: H34S0803
Product code: H34S0803
Barcode:
Code 39:
ISBN:
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Part number H34S0803 - is it the right choice?
We sell a used, working part (comfort control module) for Skoda Octavia Volkswagen Golf Touran Caddy Passat with numbers H34/S0803 / H34S0803; 1K0 937 049 N / 1K0937049N. Before buying, compare the numbers with the label on the part in your car.
Comfort control module Skoda Octavia Volkswagen Golf Touran Caddy Passat
The comfort control module is an electronic body module that handles small comfort functions in the car. This listing applies to: Skoda Octavia Volkswagen Golf Touran Caddy Passat. The part is used, working and in good condition.
Role of the part in the car
The module collects the driver's commands and distributes power to individual body circuits, so many small functions in the car depend on it. In VAG group cars the module is sometimes described as the onboard power supply control unit (Bordnetzsteuergerät); its version depends on the equipment.
When to replace the part
- door signalling works incorrectly,
- the battery drains overnight for no obvious reason,
- the interior lighting does not switch off,
- nothing happens when settings are changed.
It is worth reading the fault codes first, because many body faults come from switches or wiring rather than the module itself.
Which car it is for
- Skoda Octavia Volkswagen Golf Touran Caddy Passat - model
Fitment
Compare number H34/S0803 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
- H34/S0803 / H34S0803 - part number
- 1K0 937 049 N / 1K0937049N - VAG group number (OEM)
Questions before buying
| Is the part new? |
|---|
| It is a used, working part in good condition. Warranty details are listed in the offer features. |
| Is the part new? |
| This is a used, working part in good condition. You will find the warranty period in the product features table. |
| Which number matters most when matching? |
| It is best to compare all numbers on the label, above all the one marked as the manufacturer or OEM number. |
Not sure? Write to contact@auto24parts.com and we will help you choose the right part for your car.