BMW 135is Parts & Accessories

BMW 135is Parts & Accessories

The BMW 135is is the top-spec variant of the E82 coupe, featuring the N55HP engine with higher output from the factory, active M differential, and additional chassis and interior enhancements that set it apart from the standard 135i. It is a rare and well-equipped base for performance tuning.

Popular Upgrades

Exhaust upgrades — particularly cat-back systems and downpipes — are among the first mods on the 135is, where the stock exhaust is conservative given the car's performance character. Coilovers and sway bar upgrades work especially well on the 135is given its M differential, allowing the rear to rotate more confidently under power with better chassis control. Cold air intakes improve throttle response and complement the N55HP at higher boost levels.

How is the 135is different from the regular 135i?

The 135is uses the N55HP engine, which produces 320 hp versus the standard 135i's 300 hp, and adds an active M limited slip differential, a DCT transmission option, and a more aggressive factory suspension tune. These additions make the 135is a stronger starting point for performance builds and a closer match to the 1M in overall capability.

What tune options are available for the N55HP in the 135is?

The N55HP in the 135is responds well to ECU stage 1 and stage 2 tunes from BMW-specialist tuners. Supporting bolt-ons — downpipe, intake, and intercooler — carry the 135is into the 380–420 hp range on a stage 2 map, a significant improvement over the factory output.

Upgrade your BMW 135is with parts from our exhaust systems, suspension upgrades, and cold air intakes collections.