2021 BMW M135i Service and Repair Manual

This factory service and repair manual for the 2021 BMW M135i has a compact brief: one two-door hatchback body, one xDrive trim, and the turbocharged 2.0L DOHC inline-four of 122 cubic inches. Nothing in the specification tables has to be cross-referenced against another variant, which matters most when a torque figure or a fluid capacity has to be right the first time. Engine, driveline, chassis and body electrical work each get sections of their own.

Engines covered

• 2.0L inline-four (122 cu in) — DOHC, turbocharged, gasoline

Body styles covered

• 2-door hatchback

Trims covered

• xDrive

Known issues on the 2021 M135i. The manual gives working detail: engine mechanical procedures and torque values for the turbocharged four, charge-air and cooling system service, transmission and axle overhaul figures, steering and suspension geometry, brake specifications, and the circuit diagrams with diagnostic routines for the hatchback's body, lighting and safety systems.