BMW M8 Oxygen Sensor Replacement Parts

Yes, the BMW M8 is fitted with oxygen sensors (also called lambda sensors) as part of its exhaust management system, used to monitor exhaust gases and help the engine ECU regulate fuelling and emissions. The M8 uses the S63 twin-turbocharged 4.4-litre V8 petrol engine and is a petrol vehicle, so it does carry oxygen sensors — typically both pre-cat and post-cat sensors in the exhaust system. There are no diesel M8 variants sold in the UK, so diesel-specific lambda considerations do not apply here.

The BMW M8 was introduced in 2019 and received a mid-cycle refresh around 2022, with changes to exterior styling and interior technology but the same S63 4.4-litre twin-turbo V8 engine code throughout the range. Because the engine and its exhaust architecture remained consistent across both pre- and post-facelift cars, oxygen sensor compatibility is plausible across that boundary, but the wiring connector and sensor position can vary with exhaust system updates made at facelift. You should confirm the specific sensor part number and connector type with the breaker against your exact registration before purchasing.

Trim level does not affect oxygen sensor fitment on the BMW M8 — the standard M8 and M8 Competition both use the same S63 4.4-litre twin-turbo V8 engine, so the lambda sensors are drawn from the same engine and exhaust architecture. You may find differences in the exhaust system finish or tip style between trims, but the sensor itself is determined by the engine code and emissions calibration, not the badge on the boot. Confirm the sensor position (pre-cat or post-cat, NS or OS bank) you need with the breaker, as V8 engines carry multiple sensors.

The S63 V8 in the BMW M8 is a twin-turbocharged engine with two cylinder banks, and as a result it typically carries multiple lambda sensors — usually at least one upstream (pre-catalytic converter) and one downstream (post-catalytic converter) sensor per bank, meaning four or more sensors in total depending on the exact exhaust configuration. Ordering the wrong position sensor — for example a post-cat sensor when you need a pre-cat one — will result in a non-fitting or incorrectly functioning part, even if the connector looks similar. Tell the breaker your fault code or the exact sensor position (upstream or downstream, NS or OS) to make sure you get the right unit.

The BMW M5 (F90 generation) also uses the S63 4.4-litre twin-turbo V8, and in principle sensors from the same engine family may share part numbers, but exhaust routing, sensor bung positions and wiring loom lengths can differ between the M5 and M8 body styles. Cross-model interchange is worth exploring with a breaker who can check part numbers against both registrations, but you should not assume a straight swap without that check. This is particularly important for sensors close to the catalytic converters, where exhaust configuration differences between models are more likely.

An oxygen sensor from an emissions-failed car may itself be faulty — a failed or lazy lambda sensor is a common cause of emissions failures — so buying one from such a vehicle carries an obvious risk. That said, a car can fail emissions for reasons unrelated to the oxygen sensor itself, such as a failing catalytic converter, so the sensor may still be in serviceable condition. Ask the breaker why the donor car failed its MOT and whether they have any diagnostic history for the sensor before committing to the purchase.