2021 Subaru WRX STI Service and Repair Manual
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2021 Subaru WRX STI Service and Repair Manual
This factory service and repair manual for the 2021 Subaru WRX STI deals with five trims of the 4-door sedan: Base, Limited, Sport, Sport-tech and STI. All of them came with one engine, a 2.5L flat-four with double overhead cams that is turbocharged and runs on gasoline. In the manual are specifications, torque values and procedures for the engine, its fuel, ignition and cooling systems, the transmission and drivetrain, brakes, suspension and steering, as well as wiring diagrams and diagnostics for the electrical system.
Engines covered
- 2.5L flat-four — DOHC, turbocharged, gasoline
Body styles covered
- 4-door sedan
Trims covered
- Base
- Limited
- Sport
- Sport-tech
- STI
Known issues on the 2021 WRX STI. The turbocharged 2.5L flat-four in the 2021 WRX STI gets engine procedures, specifications and torque values in this manual, with diagnostics for the fuel, ignition and cooling systems that support it. Transmission and drivetrain procedures are included, and so are brake, suspension and steering specifications for the 4-door sedan. The electrical system is mapped with wiring diagrams and diagnostics.