Used BMW i7 Lambda Sensor

No — the BMW i7 is a fully electric vehicle and has no internal combustion engine, exhaust system, or catalytic converter, so it was never fitted with a lambda sensor at any point in its production. Lambda sensors exist solely to measure oxygen levels in exhaust gases and feed data back to a petrol or diesel engine management system, none of which are present on the i7. If you are searching for a sensor related to your i7, you may be thinking of something else entirely — common i7 sensors include those for the battery management system, temperature, or driver assistance systems, and a breaker specialising in BMW EVs would be best placed to identify what you actually need.

Almost certainly not — the BMW i7 is a battery-electric vehicle with no exhaust, no combustion engine, and no need for a lambda sensor. It is possible there has been a parts lookup error, perhaps confusing the i7 with the conventionally engined BMW 7 Series (G70 platform), which is sold alongside the i7 and does have petrol variants fitted with lambda sensors. Double-check the part being quoted against your exact registration, and clarify with the breaker whether they have looked up the correct drivetrain.

No — the BMW i7 has no exhaust system whatsoever, so there is no fitting point for a lambda sensor regardless of which 7 Series variant it comes from. The i7 and the combustion-engined 7 Series share the same G70 body platform and many interior and chassis components, but the entire drivetrain and exhaust architecture is completely different. If you need a lambda sensor, you likely own a petrol 7 Series rather than the i7, and a breaker can help you identify the correct sensor once you confirm your registration and engine code.

Depending on your symptoms or diagnostic fault code, you might be looking for a battery temperature sensor, a coolant temperature sensor, a wheel speed sensor, or one of the various sensors associated with the i7's electric drivetrain or driver assistance systems. The i7 uses a complex high-voltage battery management system with multiple monitoring sensors that are quite different from anything found on a petrol or diesel car. Describe your fault code or symptom to a breaker experienced in BMW EVs, or to a BMW specialist, and they will be able to point you towards the correct part.