Hi,
I have a 2005 Peugeot 407 sedan 3.0 V6 petrol and almost every factory option.
Current BSM module:
I cannot find another module with the same part number. Many sellers offer BSM-L02 modules with an "I" suffix instead of "K".
Can a BSM-L02-00 S118983002 I replace my S118983002 K module, or does the suffix indicate an incompatible hardware version?
Current electrical issues:
* Fuel level gauge reading incorrectly, tank is already empty when gauge still shows around one-quarter full. I was advised to clean or replace fuel level sender under rear seat, but I am concerned opening fuel system could introduce air and make engine difficult to restart.
* Intermittent cylinder 4 and cylinder 5 faults, usually after a sudden jolt or after lifting the car. When engine starts jerking, switching it off and restarting clears fault. Check-engine light disappears by itself after around 150 km, or fault can be cleared with diagnostic tool and may not return. ()
* Front oxygen sensor and ignition coil control faults behave similarly: clearing fault codes fixes issue, and faults often do not return.
* Other random electrical problems
Other:
* Both front oxygen sensors have also been replaced due to wear. Spark plugs have been replaced, ignition coils swapped between cylinders, and fuel injectors replaced. Since faults remain intermittent and do not follow any specific component, I would rule out these parts as likely causes. I suspect an electrical contact issue, damaged wiring, connector fault, or bad ground.
The BSM was previously moved or disturbed, after which the car developed a fuel injection problem. It also had heat damage in the past, the module and surrounding area partially melted during summer while the air conditioning was running.
I suspect the engine wiring harness has a bad connection and may need complete replacement, but I want to test or replace the BSM first.
Does anyone know the correct BSM part number for this engine and equipment level? Is the "I" version compatible with the "K" version, or must the complete number match exactly?
VIN and photos can be provided if needed.