How to match the 0281015165 / 4L0910409D ECU to your Audi Q7 4.2 TDI
Has the 4L0910409D ECU in your Q7 4.2 TDI failed? This Bosch 0281015165 (EDC16CP34) 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: 0281015165 (0 281 015 165)
- Audi number: 4L0910409D (4L0 910 409 D)
- ECU type: Bosch EDC16CP34
Master and slave in the Audi Q7 4.2 TDI
The Q7 4.2 TDI uses a pair of ECUs: master (horizontal) and slave (vertical), both numbered 0281015165. If you are looking for a replacement, it is most likely the master. It is the one exposed to water that enters under the scuttle panel from the wipers and reaches the housing along a sensor cable. Slave failures are only occasional.
Vehicle compatibility
The label decides, not the model year: Bosch number 0281015165 and Audi number 4L0910409D must match your ECU. If your Q7 version is not mentioned here, the ECU may still fit. The similar number 0281013013 (4L0910409) has different software and is not a replacement.
Preparation and installation
Once connected, this unit has to be programmed to the car – usually a workshop does it with ODIS, VAS or VCDS. If you prefer to avoid programming, we will clone the data from your current ECU or from files; the service is included in the price.
Prefer to skip programming? We have a master + slave set with the same numbers in an IMMO OFF version, fitted without programming: 0281015165 / 4L0910409D – set of 2, IMMO OFF.
Symptoms of a failed ECU in the Q7 4.2 TDI
A failed ECU in the Q7 4.2 TDI usually shows sudden symptoms, for example:
- the engine starts and stalls shortly after
- rough engine running
- the car cannot be started after replacing one ECU
- no diagnostic communication with one of the ECUs
Power supply, wiring or the battery can cause similar symptoms – run a diagnosis before buying. More in the article: Audi Q7 4.2 TDI – master and slave ECU failure.
Other Audi Q7 4.2 TDI ECUs in stock
Full range: Audi engine ECUs · Bosch ECUs
Frequently asked questions about 0281015165 / 4L0910409D
Why is it mainly the master that fails in the Q7 4.2 TDI?
The master lies horizontally under the scuttle panel. When water from the wipers gets under the panel, it runs along a sensor cable into the ECU. The vertical slave is much less exposed.
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How do I order cloning of the 4L0910409D ECU?
Send us the faulty ECU or its files. We will transfer the data to the 0281015165 ECU, and the service is included in the price.
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How do I check that 0281015165 fits my Q7?
Compare Bosch number 0281015165 and Audi number 4L0910409D with the label on your old ECU. If both match, the ECU fits – even if your model year is not listed in the description.
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