2019 Subaru WRX STI Service and Repair Manual

This factory service and repair manual for the 2019 Subaru WRX STI includes the S209 among six trims, the others being Base, Limited, Sport, Sport-tech and STI, all on the 4-door sedan. Each uses a 2.5L flat-four fed by a turbocharger, with double overhead camshafts and gasoline fuel. Specifications and diagnostics for that engine sit alongside procedures for fuel delivery, ignition, cooling, the transmission and drivetrain, the brakes, suspension and steering, and wiring diagrams for the electrical system.

Engines covered

• 2.5L flat-four — DOHC, turbocharged, gasoline

Body styles covered

• 4-door sedan

Trims covered

• Base
• Limited
• S209
• Sport
• Sport-tech
• STI

Known issues on the 2019 WRX STI. The 2019 WRX STI has 1 owner complaint recorded by NHTSA, and it names both the electrical system and the engine. For those two systems the manual provides wiring diagrams, diagnostics, procedures and specifications. On the engine side that means the turbocharged 2.5L flat-four, its fuel and ignition systems and its cooling; on the electrical side, wiring diagrams and diagnostic routines for the sedan's electrical system.