How to match the 0281031081 / 4L0910409T ECU to your Audi Q7 4.2 TDI
Has the 4L0910409T ECU in your Q7 4.2 TDI failed? This Bosch 0281031081 (EDC17CP44) is a direct equivalent – used, checked in our test car and ready to be programmed after fitting. The warranty is 6 months.
Label markings
- Bosch number: 0281031081 (0 281 031 081)
- Audi number: 4L0910409T (4L0 910 409 T)
- ECU type: Bosch EDC17CP44
Master and slave in the Audi Q7 4.2 TDI
Number 4L0910409T is used for both the master and the slave ECU – the Q7 4.2 TDI has two of them. The master sits horizontally and is the one that usually floods: water from around the wipers runs under the scuttle panel and then along a sensor cable into the ECU. The vertically mounted slave rarely needs replacing.
Vehicle compatibility
The ECU fits the Audi Q7 4L 4.2 TDI V8. The model list does not decide fitment either way – what matters is that Bosch number 0281031081 and Audi number 4L0910409T match the label on your ECU. A different number, e.g. 0281017983 (4L0910409H), means different software, so it will not replace this unit.
Preparation and installation
This unit is not prepared as IMMO OFF: after fitting it has to be adapted to the car with ODIS, VAS or VCDS. The other route is cloning – send us the faulty ECU or its files and we will transfer the data to the new unit free of charge.
For EDC17CP44 ECUs from the Q7 4.2 TDI we do not offer an IMMO OFF set – you can choose programming or cloning, which is included in the price.
Symptoms of a failed ECU in the Q7 4.2 TDI
The master sits horizontally under the scuttle panel, which is why it is the one that usually fails after water ingress. Typical symptoms:
- the engine starts and stalls shortly after
- immobiliser fault codes
- the car does not start
- the car cannot be started after replacing one ECU
Power supply, wiring or the battery can cause similar symptoms, so it is worth running a diagnosis before buying.
Other Audi Q7 4.2 TDI ECUs in stock
Full range: Audi engine ECUs · Bosch ECUs
Frequently asked questions about 0281031081 / 4L0910409T
How do I order cloning of the 4L0910409T ECU?
Send us the faulty ECU or its files. We will transfer the data to the 0281031081 ECU, and the service is included in the price.
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Do both ECUs have to be replaced at once?
No. If only the master is damaged, one 0281031081 ECU with programming or cloning is enough.
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Will 0281031081 work without programming?
No. A single ECU has to be programmed after fitting (ODIS, VAS, VCDS), or you can have us clone the data from your old ECU, which is included in the price.
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