Own a Subaru Ascent in the Phoenix area? EZ Swap LLC repairs and maintains the Subaru Ascent for model years 2019 to 2027. Our shop at 9050 N 9th St handles everything from routine service to diagnostics and major repairs.
To help Ascent owners know what to watch for, we reviewed public records from the National Highway Traffic Safety Administration (NHTSA). For these model years NHTSA has 1,040 owner complaints on file for the Ascent and 13 safety recall campaigns. The most-reported problem areas are electrical system (293), power train (188), visibility/wiper (153).
Most-Reported Subaru Ascent Problems
These problem areas come up most often in NHTSA owner complaints for the Ascent (all model years combined). Complaint counts reflect reports filed, not the share of vehicles affected, so popular and older models naturally have more.
| Problem area (NHTSA component) | Complaints | Share | |
|---|---|---|---|
| Electrical System | 293 | 28% | |
| Power Train | 188 | 18% | |
| Visibility/Wiper | 153 | 14% | |
| Engine | 104 | 10% | |
| Service Brakes | 83 | 7% | |
| Visibility | 54 | 5% | |
| Forward Collision Avoidance | 49 | 4% | |
| Fuel/Propulsion System | 38 | 3% |
Electrical System
293 of the 1,040 complaints (28%) mention the electrical system. Electrical problems are made worse by desert heat, which ages batteries, cables and connectors. We test the battery, starter and charging system and trace faults to the actual part. See our battery replacement and starter & alternator repair pages.
Power Train
188 of the 1,040 complaints (18%) mention the powertrain. Powertrain complaints can range from rough shifting to loss of drive. We road test, scan for stored codes and inspect fluids before recommending any repair. See our auto repair page.
Visibility/Wiper
153 of the 1,040 complaints (14%) mention lighting and visibility. Lights, wipers and visibility items are quick to fix and are on every rideshare inspection checklist. We check them as part of our inspection prep. See our rideshare inspection prep page.
Subaru Ascent Complaints by Model Year
The Ascent model years with the most NHTSA complaints on file are 2019, 2020, 2021. Older model years have had more time to collect reports, so use this table as a guide for what to inspect, not as a verdict on any one vehicle.
| Model year | Complaints on file | |
|---|---|---|
| 2019 | 443 | |
| 2020 | 324 | |
| 2021 | 103 | |
| 2022 | 56 | |
| 2023 | 45 | |
| 2024 | 51 | |
| 2025 | 15 | |
| 2026 | 3 |
Subaru Ascent Check Engine Codes
NHTSA owner complaints rarely cite specific trouble codes for the Ascent, so we do not have a model-specific ranking to show. These are the check engine codes we see most often on vehicles in Phoenix heat, and any of them can show up on a Subaru.
| Code | What it means |
|---|---|
| P0420 | Catalyst efficiency below threshold (bank 1) Often a worn catalytic converter, but failing oxygen sensors or exhaust leaks can set it too. Can cause an emissions test failure. |
| P0300 | Random or multiple cylinder misfire Worn spark plugs, failing ignition coils, fuel or vacuum problems. Do not ignore a flashing check engine light. |
| P0171 | System too lean (bank 1) Often a vacuum leak, dirty MAF sensor, weak fuel delivery or a failing oxygen sensor. |
| P0455 | EVAP system large leak Missing or loose gas cap, or a disconnected or cracked vapor hose. |
| P0128 | Coolant temperature below thermostat regulating temperature Usually a thermostat stuck open. Fix it to restore efficiency and cabin heat. |
| P0442 | EVAP system small leak Loose or worn gas cap, cracked hose or purge or vent valve. |
| P0301 | Cylinder 1 misfire Commonly a bad spark plug or ignition coil on that cylinder. |
| P0401 | EGR flow insufficient Clogged EGR passages or a stuck EGR valve. |
Got a check engine light on your Ascent? A code is a clue, not a diagnosis, so we scan it and test the system before replacing anything. See our check engine light diagnostics.
Subaru Ascent Safety Recalls
NHTSA lists 13 recall campaigns for the Ascent in these model years, most often involving power train, fuel system, gasoline, engine and engine cooling. Recalls are repaired by the manufacturer at no charge to you, but each applies only to certain vehicles. Look up your VIN at nhtsa.gov/recalls.
- 2026 recall, Equipment (campaign 26V436000): Subaru of America, Inc. (Subaru) is recalling certain 2026 Crosstrek Hybrid, 2025-2026 Forester Hybrid, Forester, and 2019-2026 Ascent vehicles.
- 2023 recall, Tires (campaign 23V258000): Subaru of America, Inc. (Subaru) is recalling certain 2023 Ascent vehicles equipped with 20-inch wheels. The internal tire bead may have been damaged during the wheel mounting process.
- 2023 recall, Suspension (campaign 23V392000): Subaru of America, Inc. (Subaru) is recalling certain 2023 Ascent vehicles. The left or right front lower control arm may have an improperly tightened ball joint castle nut which can result in retention pin failure and separation of the...
- 2023 recall, Power Train (campaign 23V647000): Subaru of America, Inc. (Subaru) is recalling certain 2023 Outback, Legacy, Ascent, and Impreza vehicles. The center support bolts for the driveshaft may loosen, resulting in the disconnection of the front end of the driveshaft.
- 2022 recall, Electrical System (campaign 22V907000): 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 improperly fastened, which could result in...
- 2021 recall, Power Train (campaign 21V955000): Subaru of America, Inc. (Subaru) is recalling certain 2019-2020 Ascent, 2020 Legacy and Outback vehicles.
Serious Incident Reports
Of the NHTSA complaints on file for the Ascent, 34 involved a crash, 12 involved a fire, 28 reported injuries. These numbers are drawn from self-reported complaints and are not verified findings. If your vehicle has an open recall, get it repaired promptly.
Keeping a Subaru Ascent Reliable in Phoenix
Arizona heat is the hardest test a Subaru will face. Batteries, belts, hoses, tires and engine oil all wear faster here, and a Ascent that spends its life in stop-and-go Valley traffic needs maintenance earlier than the owner's manual's normal schedule suggests.
Our recommendation for Ascent owners: follow the severe-service schedule, test the battery before every summer, inspect brakes and tires twice a year, and have any warning light diagnosed instead of ignored. If you are shopping for a used Subaru Ascent, a pre-purchase inspection shows what the paperwork does not.
Subaru Ascent Services at EZ Swap LLC
Get the details on our Phoenix Subaru Ascent repair service, or choose a service below.
Battery Replacement
Test, replace and protect against Phoenix heat.
Details →Starter & Alternator Repair
Charging and starting system repair.
Details →Auto Repair
All makes and models, from domestic trucks to imports.
Details →Rideshare Inspection Prep
Get approved for Uber, Lyft and more.
Details →Oil Change & Maintenance
Oil, filters, fluids, tires and scheduled service.
Details →Car A/C Repair
Phoenix heat demands cold air.
Details →Subaru Ascent FAQ
What are the most common problems with the Subaru Ascent?
Based on NHTSA owner complaints, the most-reported problem areas for the Subaru Ascent are electrical system (293), power train (188), visibility/wiper (153). Complaint counts reflect reports filed, not the share of vehicles affected.
Which Ascent model years have the most complaints?
The Ascent model years with the most NHTSA complaints on file are 2019, 2020, 2021. Older years have had longer to collect reports, so inspect any specific vehicle before buying.
What check engine codes are common on the Subaru Ascent?
NHTSA complaints rarely cite specific codes for the Subaru Ascent. On Phoenix vehicles in general, we see P0420, P0300 misfires, P0171 lean conditions and EVAP leaks such as P0455 and P0442 most often. Bring yours in and we will scan and test it.
Does the Subaru Ascent have any safety recalls?
NHTSA lists 13 recall campaigns for the Subaru Ascent across model years 2019 to 2027. Each recall applies only to certain vehicles, so enter your VIN at nhtsa.gov/recalls to see if yours is affected.
Do you repair the Subaru Ascent in Phoenix?
Yes. EZ Swap LLC repairs and maintains Subaru vehicles including the Ascent, at 9050 N 9th St in Phoenix. Call or text (602) 246-9063 for an appointment.
Is a pre-purchase inspection worth it for a used Subaru Ascent?
Yes. An inspection checks the engine, transmission, brakes, suspension, A/C and electrical system, and scans for stored codes, so you know the real condition before you buy.
How often should I service my Subaru Ascent in Phoenix?
Follow the severe-service schedule in your owner's manual, since heat and stop-and-go driving count as severe use. Test the battery before summer and inspect brakes and tires regularly.
More Subaru Models We Service
Source: public complaint and recall records from the National Highway Traffic Safety Administration (nhtsa.gov). Counts reflect reports filed and do not predict the condition of any individual vehicle.