2019 Subaru Ascent Service and Repair Manual

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Factory-Grade Data

2019 Subaru Ascent 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
  • Base Sport Utility 4-Door

Engines covered

  • 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

2019 Subaru Ascent 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 #20V21800016/04/2020Component: FUEL SYSTEM, GASOLINE:DELIVERY:FUEL PUMP

Subaru of America, Inc. (Subaru) is recalling certain 2019 Impreza, Outback, Legacy, and Ascent vehicles. The low pressure fuel pump may become inoperative.

Consequence

If the low pressure fuel pump fails, the engine may stall without the ability to restart the vehicle

Remedy

Subaru will notify owners, and dealers will replace the low pressure fuel pump, free of charge. The

NHTSA #19V51900010/07/2019Component: POWER TRAIN:DRIVELINE:DRIVESHAFT

Subaru of America, Inc. (Subaru) is recalling certain 2019 Ascent vehicles. The center support bolts for the driveshaft may loosen, possibly resulting in the front portion of the driveshaft disconnec

Consequence

If the front end of the driveshaft separates, it can increase the risk of a crash.

Remedy

Subaru will notify owners, and dealers will replace the driveshaft assembly, including the center su

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 #22V90700008/12/2022Component: ELECTRICAL SYSTEM:WIRING:INTERIOR/UNDER DASH

Subaru of America, Inc. (Subaru) is recalling certain 2019-2022 Ascent vehicles. The ground bolt that secures the ground terminal of the Positive Temperature Coefficient (PTC) heater may have been im

Consequence

A melting ground terminal increases the risk of a fire.

Remedy

Owners are advised to park their vehicle away from structures and to avoid leaving the vehicle unatt

NHTSA #19V85500002/12/2019Component: POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM)

Subaru of America, Inc. (Subaru) is recalling certain 2019 Ascent vehicles. The transmission hydraulic sensor may inaccurately measure the hydraulic fluid pressure.

Consequence

If the fluid pressure is measured higher than its actual value, the hydraulic pressure will be reduc

Remedy

Subaru will notify owners, and dealers will reprogram the transmission control unit. The hydraulic

NHTSA #19V85600002/12/2019Component: ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CRANKCASE (P

Subaru of America, Inc. (Subaru) is recalling certain 2019 Crosstrek, Forester, and Ascent vehicles. The aluminum Positive Crankcase Ventilation (PCV) valve can separate, allowing the separated compo

Consequence

An unexpected loss of power while driving can increase the risk of a crash.

Remedy

Subaru will notify owners, and dealers will inspect and replace the PCV valve, free of charge. If t

NHTSA #18V50800002/08/2018Component: STRUCTURE:BODY:ROOF AND PILLARS

Subaru of America, Inc. (Subaru) is recalling certain 2019 Subaru Ascent vehicles. These vehicles may be missing spot welds on, or around, the B-Pillar, compromising vehicle strength.

Consequence

In the event of a crash, the missing spot welds may compromise the vehicle's strength, increasing th

Remedy

Subaru will notify owners, and dealers will inspect the vehicle to check for missing spot welds. If

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 #11030573

In the interest of customer satisfaction, Subaru of America, Inc. (SOA) is extending the New Car Limited Warranty coverage for the front brake on 2019-24 model year Ascent models to 8 years (96 months) or 150,000 miles (whichever comes firs

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

TSB #11030561

This announcement provides information on the use of aftermarket services or tools for programming immobilizer keys/fobs.

TSB #11030560

This bulletin announces the new procedure and Warranty Fail Code for FirstTime air conditioning (A/C) performance concerns possibly resulting from an undetected A/C refrigerant leak.

Showing the 8 most recent of 595 technical service bulletins on file with NHTSA.

20260324Component: AIR BAGSCrash reportedFire reported1 injured

The contact owns a 2019 Subaru Ascent. The contact stated that while his wife was driving at approximately 75 MPH, a deer ran across the highway and hit the left driver's side of the vehicle. The air

20260324Component: ENGINECrash reportedFire reported1 injured

The contact owns a 2019 Subaru Ascent. The contact stated that while his wife was driving at approximately 75 MPH, a deer ran across the highway and hit the left driver's side of the vehicle. The air

20191129Component: STRUCTURE:BODYCrash reportedFire reported1 injured

TRAVELING ON HIGHWAY AT 70 MPH WHEN A DEER JUMPED IN FRONT OF OUR CAR AND WE HIT IT WITH THE FRONT END OF THE VEHICLE CRUSHING THE FRONT END. ALL AIR BAGS IMMEDIATELY DEPLOYED AND THE FRONT END BEGAN

20191129Component: FUEL/PROPULSION SYSTEMCrash reportedFire reported1 injured

TRAVELING ON HIGHWAY AT 70 MPH WHEN A DEER JUMPED IN FRONT OF OUR CAR AND WE HIT IT WITH THE FRONT END OF THE VEHICLE CRUSHING THE FRONT END. ALL AIR BAGS IMMEDIATELY DEPLOYED AND THE FRONT END BEGAN

20191129Component: UNKNOWN OR OTHERCrash reportedFire reported1 injured

TRAVELING ON HIGHWAY AT 70 MPH WHEN A DEER JUMPED IN FRONT OF OUR CAR AND WE HIT IT WITH THE FRONT END OF THE VEHICLE CRUSHING THE FRONT END. ALL AIR BAGS IMMEDIATELY DEPLOYED AND THE FRONT END BEGAN

Showing the 5 most serious of 545 complaints filed with NHTSA.

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