2021 Subaru Forester Service and Repair Manual

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Covers all 2021 Forester trims — Premium Sport Utility 4-Door, Limited Sport Utility 4-Door, Convenience Sport Utility 4-Door +4 more ·
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2021 Subaru Forester service and repair manual — a detailed, factory-style reference for maintenance, diagnostics, and repair. Use it to confirm correct procedures, specifications, and system coverage before you start work.

Designed for technicians and DIY owners, this manual helps you diagnose issues correctly, follow proven repair steps, and use wiring diagrams and system sections to track faults faster.

What’s included

  • Step-by-step repair procedures and service information
  • Specifications and reference data (where provided)
  • Electrical diagnostics with wiring diagrams
  • Coverage across major systems: engine, transmission/driveline, brakes, steering, suspension, HVAC, and more

Trims covered

  • Premium Sport Utility 4-Door
  • Limited Sport Utility 4-Door
  • Convenience Sport Utility 4-Door
  • Touring Sport Utility 4-Door
  • Premier Sport Utility 4-Door
  • Sport Sport Utility 4-Door
  • Base Sport Utility 4-Door

Engines covered

  • 2.5L 2498CC 152Cu. In. H4 GAS DOHC Naturally Aspirated

Index / Table of contents

  • Body
  • Brakes
  • Chassis Electrical
  • Driveline
  • Engine Cooling
  • Engine Electrical
  • Engine Mechanical
  • Engine Performance & Emission Controls
  • Fuel System
  • General Information & Identification
  • Heating, Ventilation, & Air Conditioning
  • Hybrid & Electric Vehicle Systems
  • Steering
  • Suspension
  • Transmission, Clutch, & Transfer Case
  • Wiring Diagrams
No active recalls The 2021 Subaru Forester has no recalls on file with NHTSA.
TSB #11033069

This bulletin contains additional information for recommended materials listed in the Service Manuals for individual models.

TSB #11033065

This bulletin provides updated parts information and a service procedure to follow for removing accumulated carbon deposits from fuel injectors and internal engine components (e.g. intake valves and / or manifold, and combustion chambers).

TSB #11033063

This bulletin announces a design change made to the CVT Control Valve Body which incorporates an enhanced valve sleeve to improve durability.

TSB #11033056

This announcement provides information on the remanufactured CVT transmission program.

TSB #11033052

This bulletin announces a design change to the Power Rear Gate Drive (PRG) Unit to address rare concerns about a very slight drop immediately after the gate is fully open.

TSB #11033051

This bulletin announces the diagnostic procedures to be used when DTCs B1571(REFERENCE CODE INCOMPATIBILITY IMMOBILIZER CM TO ECM) and B1572(IMM CIRCUIT EXCEPT ANTENNA CIRCUIT) are detected by Keyless Access with Push Button Start(KACM).

TSB #11032040

This bulletin announces the service manual correction regarding clutch master cylinder reservoir service procedures.

TSB #11032039

This bulletin contains additional information for recommended materials listed in the Service Manuals for individual models.

Showing the 8 most recent of 343 technical service bulletins on file with NHTSA.

20220613Component: ENGINECrash reportedFire reported1 injured

The contact owned a 2021 Subaru Forester Sport. The contact stated while driving at 75 MPH, the front end of the vehicle crashed into a small deer. The air bags did not deploy. The contact veered to t

20240507Component: UNKNOWN OR OTHERCrash reportedFire reported

To whom this may concern, My name is [XXX] . I was the owner of a 2021 Subaru Forester. I bought this car brand new and I loved this car. One of the biggest reasons I bought a Subaru is because of the

20260312Component: POWER TRAINCrash reported4 injured

The contact owned a 2021 Subaru Forester. The contact stated that while driving at approximately 4 MPH and slowing to park, the vehicle accelerated on its own. The contact stated that the vehicle drov

20260312Component: ENGINECrash reported4 injured

The contact owned a 2021 Subaru Forester. The contact stated that while driving at approximately 4 MPH and slowing to park, the vehicle accelerated on its own. The contact stated that the vehicle drov

20250710Component: STEERINGCrash reported1 injured

While driving on I-17 Southbound near mile marker 311 at approximately 75 mph, I experienced a sudden and dangerous malfunction of the Lane Keep Assist (Auto-Steer) system in a 2021 Subaru Forester. T

Showing the 5 most serious of 278 complaints filed with NHTSA.

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