BNS 4.2 FSI 420hp
Engine code BNS is a petrol engine of 4,163 cc, rated at 420 hp.
Cars fitted with BNS
| Make | Model | Generation | Power |
|---|---|---|---|
| Audi | RS4 | B7 (2005–2008) | 420 hp |
Which ECU it runs
BNS is controlled by a Bosch MED9.1 (FSI, dual-bank) engine control unit.
What goes wrong with this engine
The faults this engine is genuinely known for — and the timing arrangement, which decides a great deal about running costs — are covered in 4.2 V8 FSI problems.
Where to find your engine code
The three or four letter code is stamped on the engine block and is usually printed in the service book. It is also stored electronically, so any diagnostic tool that talks to the engine control unit will read it back without you having to find the stamping.
The code matters more than the model year. Cars of the same age and badge were built with different engines, and the timing arrangement, common faults and correct parts all follow the code rather than the year.
VAGPULSE reads the engine code straight off the ECU, along with every stored fault and the live data behind it — so you never have to guess which engine you have. One payment, no subscription.
See VAGPULSE Look up a fault codeCommon questions
What car has engine code BNS?
BNS was fitted to the Audi RS4 B7 (2005–2008).
What is engine code BNS?
BNS is a 4.2 FSI 420hp (petrol).
Which ECU does BNS use?
BNS runs a Bosch MED9.1 (FSI, dual-bank) engine control unit.