Fuel-vapor charcoal canister
Temporarily traps fuel vapor for later controlled burning.
Near the fuel tank or rear underbody on equipped petrol cars.
Activated carbon adsorbs vapor; controlled airflow later carries vapor toward the engine.
An odor-trapping storage sponge.
Fuel smell or evaporative-system faults can involve the canister, seals, valves or plumbing.
Plugs and filters use engine-specific service guidance. Pumps and injectors are normally assessed through pressure, leakage and electrical tests.
Spark-plug service is usually less involved than direct-injector or high-pressure-pump replacement; coding and access can add work.
A BMW vapor canister handles fuel vapor; it is not an exhaust particulate filter.
BMW combustion models; spark components are petrol-only and glow-plug hardware is diesel-only.