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.
Engine control unit Audi Q7 Bosch 4L0910401N 0281013688
Vendors's code: 0281013688
Product code: 4L0910401N
Barcode:
Code 39:
ISBN:
€650.41
Price
€650.41
€800.00
Price
€800.00
Ask about the product
Engine control unit Audi Q7 Bosch 4L0910401N 0281013688
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Where is the number 0281013688 on the control unit housing?
This is a Bosch control unit with number 0281013688, listed in the VAG group as 4L0910401N for diesel engines. Used and working, intended for Audi Q7; compare the numbers with the marking on your own unit.
Engine control unit 0281013688 – Audi Q7
Behind the number 0281013688 stands Bosch, a manufacturer supplying engine control units to the VAG group. This is a used, working unit for diesel engines, listed in the group as 4L0910401N.
Part numbers to compare
- 0 281 013 688 / 0281013688 – Manufacturer part number (Bosch)
- 4L0 910 401 N / 4L0910401N – VAG group part number
Remove the cover of the control unit in your car and read the label: look for 0281013688 or 4L0910401N. The spaced form (e.g. 0 281 013 688) is the same number.
When does an engine control unit start causing trouble?
Typical symptoms are hard or no starting, an engine warning light, limp mode, no communication with diagnostics and injection system errors. Before replacing the unit, check the power supply, grounds, fuses and wiring – the control unit is not always the cause.
Locked or unlocked version?
A locked unit still carries the data and immobiliser of the previous car – it suits workshops that unlock, program and match the part themselves. We prepare an unlocked unit before dispatch (about 1–2 working days). Not every unlocking method is available for every unit – it depends on the number, software and immobiliser, so ask before buying if in doubt. Details: engine ECU preparation options.
Questions about this control unit
| Does the control unit need coding after replacement? | Usually yes – the unit works together with the immobiliser and the vehicle, so it often needs matching. A locked unit comes with the data of the previous car, an unlocked one is prepared by us before dispatch. |
| Can I confirm compatibility before buying? | Yes. Write to contact@auto24parts.com with the number from your control unit’s housing or your VIN – we will check whether 0281013688 / 4L0910401N is the right one. |
| Is this control unit new? | No, it is a used part removed from a vehicle, working and in good condition. |
Questions, or want to confirm the fit? Write to contact@auto24parts.com. See also: engine control units for Audi and all engine control units.
