2020 Subaru Legacy Service and Repair Manual

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Factory-Grade Data

2020 Subaru Legacy 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 Sedan 4-Door
  • Premier Sedan 4-Door
  • Touring XT Sedan 4-Door
  • Base Sedan 4-Door
  • Convenience Sedan 4-Door
  • Sport Sedan 4-Door
  • Premier GT Sedan 4-Door
  • Limited XT Sedan 4-Door
  • Limited GT Sedan 4-Door
  • Limited Sedan 4-Door
  • Touring Sedan 4-Door

Engines covered

  • 2.5L 2498CC 152Cu. In. H4 GAS DOHC Naturally Aspirated
  • 2.4L 2387CC 146Cu. In. H4 GAS DOHC Turbocharged

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

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Vehicle Safety Data

2020 Subaru Legacy Recalls & Complaints

NHTSA #21V58700029/07/2021Component: FUEL SYSTEM, GASOLINE:DELIVERY:FUEL PUMP

Subaru of America, Inc. (Subaru) is recalling certain 2019-2020 Ascent, 2018 Forester, 2018-2020 Impreza, Legacy, Outback, 2018-2019 BRZ, WRX, and Toyota 86 vehicles. The low-pressure fuel pump insid

Consequence

Fuel pump failure can cause an engine stall while driving, increasing the risk of a crash.

Remedy

Dealers will replace the low-pressure fuel pump, free of charge. Owner notification letters were ma

NHTSA #24V22700022/03/2024Component: AIR BAGS:SENSOR:OCCUPANT CLASSIFICATION:FRONT PASSENGER

Subaru of America, Inc. (Subaru) is recalling certain 2020-2022 Outback and Legacy vehicles. A capacitor in the sensors for the Occupant Detection System (ODS) may crack and short circuit, which can

Consequence

An air bag that does not deploy during a crash can increase the risk of injury.

Remedy

Dealers will replace the ODS sensors on the front passenger seat, free of charge. Owner notificatio

NHTSA #19V66400018/09/2019Component: SERVICE BRAKES, HYDRAULIC:PEDALS AND LINKAGES

Subaru of America, Inc. (Subaru) is recalling certain 2020 Outback and Legacy vehicles. The brake pedal mounting bracket may have a missing or insufficiently tightened bolt.

Consequence

A missing or loose bolt may cause the brake pedal mounting area to deform over time, which can reduc

Remedy

Subaru will notify owners, and dealers will inspect the brake pedal mounting bracket hardware and re

NHTSA #21V95500009/12/2021Component: POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM)

Subaru of America, Inc. (Subaru) is recalling certain 2019-2020 Ascent, 2020 Legacy and Outback vehicles. A programming error in the Transmission Control Unit (TCU) may allow the clutch to engage bef

Consequence

An improperly secured drive chain may slip and break, causing a loss of drive power and increasing t

Remedy

Dealers will reprogram the TCU, inspect TCU data for chain slip, and visually inspect the chain guid

NHTSA #22V48500008/07/2022Component: POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM)

Subaru of America, Inc. (Subaru) is recalling certain 2020-2021 Outback and Legacy vehicles. A programming error in the Transmission Control Unit (TCU) may allow the clutch to engage before the drive

Consequence

An improperly secured drive chain may slip and break, causing a loss of drive power and increasing t

Remedy

Dealers will reprogram the TCU, inspect TCU data for chain slip, and visually inspect the chain guid

TSB #11032041

This announcement is an update to safety recall WRA-24 ODS sensor replacement for 2020-2022 MY Subaru Legacy and Outback vehicles.

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.

TSB #11032037

In the interest of customer satisfaction, Subaru of America, Inc. (SOA) is extending the New Car Limited Powertrain Warranty coverage for the Continuously Variable Transmission (CVT) on the above listed models and model years from the origi

TSB #11032035

This Bulletin provides the diagnostic procedures to be followed when addressing customer concerns of steering wheel/vehicle body vibration when driving at highway speeds when tire/wheel balance is suspected.

TSB #11032034

This Service Information Bulletin was developed to provide interim guidance for vehicles exhibiting DTC B2A20.

TSB #11030569

Subaru of America, Inc. (Subaru) has initiated a safety recall for certain 2020-2022 model year Legacy and Outback vehicles to replace all (four) of the Occupant Detection System (ODS) sensors on the front passenger seat.

TSB #11030567

This bulletin contains information to help when attempting to complete the STARLINK Telematics subscription process, an Error Code 202 and / or 204 may occur preventing the process from completing successfully

Showing the 8 most recent of 556 technical service bulletins on file with NHTSA.

20220407Component: VEHICLE SPEED CONTROL:ACCELERATOR PEDALCrash reported1 injured

The contact's wife owned a 2020 Subaru Legacy. The contact stated while his wife was driving approximately 3 MPH in a parking lot the vehicle suddenly accelerated and jumped the curb into woods and co

20250716Component: ELECTRICAL SYSTEMFire reported

One hour into traveling on the highway smoke began to come from under the hood so we pulled off to the side of the road. Upon opening the hood, after the smoke cleared, a fire was observed. At that po

20250716Component: ENGINEFire reported

One hour into traveling on the highway smoke began to come from under the hood so we pulled off to the side of the road. Upon opening the hood, after the smoke cleared, a fire was observed. At that po

20260401Component: SEATS

Driver's seat structurally unstable due to factory-installed welded nut shearing off the seat rail anchor at approximately 32,000 miles. Confirmed by Napleton Subaru technician on video. Physical comp

20251105Component: VISIBILITY:POWER WINDOW DEVICES AND CONTROLS

The contact owns a 2020 Subaru Legacy. The contact stated that during inclement weather, the front driver and front passenger’s side power windows failed to automatically roll up as intended. The co

Showing the 5 most serious of 140 complaints filed with NHTSA.

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