The E46 M3 is widely regarded as the benchmark naturally aspirated M3, built around the S54, the most powerful naturally aspirated production engine BMW had made at the time. It also introduced the CSL in 2003, a track-focused, weight-reduced variant with a carbon-fibre roof, produced in limited numbers.

Suspension and chassis parts make up the bulk of this range, but the E46 is also where exhaust and engine/tuning parts see their strongest showing across the whole M3 lineup - both are meaningfully larger categories here than on the E30, E36 or E9X pages, reflecting how actively this generation is still modified for track and fast road use.

Cooling and braking parts, while smaller categories by volume, are worth a look if you're pushing an E46 M3 hard: the naturally aspirated S54 rewards keeping temperatures in check. Shop E46 M3 exhaust systems, coilovers and suspension, engine and tuning parts, cooling, brakes and drivetrain components below from brands including Powerflex, Whiteline, DeatschWerks and BC Racing.