On the Porsche Cayenne 957, VW Touareg 7L and Audi Q7 4L, the engine ECU, KESSY (J518), BCM, steering lock and instrument cluster share immobilizer data. Start with the failed component identified by your technician. When the KESSY or ECU is damaged, or several modules are faulty, a matched starting set from one donor car is often the fastest way to get the vehicle running.
What a starting set includes
- Engine ECU — Bosch MED9.1 on the 3.6 V6, Siemens VDO SDI4 on the Cayenne 4.8 V8.
- KESSY / J518 — keyless entry and start authorization.
- BCM / J519 or gateway, depending on the set.
- Steering lock (ELV), key reader and instrument cluster, where listed.
- Original programmed key(s).
All parts come from one donor and are already matched. In a compatible vehicle, the set is ready to start without separate immobilizer matching or key programming. Read the contents line by line: sets differ.
Sets in our stock
| Set | Engine | ECU / KESSY |
|---|---|---|
| Cayenne 957 3.6 | 3.6 V6 | 03H906032DK (Bosch 0261S02365), KESSY 3D0909139D |
| Cayenne 957 4.8, km/h cluster | 4.8 V8 | 022906032ME (Siemens 5WP46503), KESSY 3D0909137F |
| Cayenne 957 4.8 Turbo | 4.8 V8 Turbo | 022906032ME |
| Cayenne 957 Turbo (2007) | 4.8 V8 Turbo | 022906032LJ (Siemens 5WP46501), KESSY 3D0909137D |
| Audi Q7 4L 3.6 FSI | 3.6 V6 | 03H906032CA (Bosch 0261S02529) |
| VW Touareg 7L 3.6 FSI, 2 keys | 3.6 V6 BHK | 03H906032CR (Bosch 0261S02586), KESSY 3D0909137F |
| VW Touareg 7L 3.6 FSI | 3.6 V6 | 03H906032CR, KESSY 3D0909139B |
What to compare
- Engine and ECU number — the full number including the last letters, for example 022906032ME versus 022906032LJ.
- KESSY number — see our KESSY guide.
- Cluster units — some sets have a km/h cluster. If your car shows mph, decide with your installer whether you keep your own cluster, and how donor coding and mileage will be handled correctly.
- Steering lock and reader — check whether your repair needs them and whether the set includes them.
- Keys — how many keys come with the set. The mechanical key blade may differ from your door locks.
Porsche's technical bulletin for first-generation Cayenne immobilizer repairs explains why component teaching and the order of the repair matter.
Frequently asked questions
Will the set start my car straight away?
In a compatible vehicle, yes, without separate key programming. Other systems in the car must be compatible and working, and some options may need adaptation.
Can I fit only the ECU from a set?
Then it behaves like a standalone ECU and needs immobilizer work by a specialist. The set is designed to be fitted together.
Do Cayenne and Touareg sets interchange?
No. Match the set to your exact vehicle and engine.
Send your VIN and ECU, KESSY and cluster labels on WhatsApp, or browse Porsche modules and all ECU and immobilizer key sets.