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NHTSA Federal Consumer Defect Registry

2021 Subaru Ascent Owner Complaints (100)

Analysis of 100 verified consumer complaints submitted to the National Highway Traffic Safety Administration (NHTSA). Filtered and clustered by vehicle subsystem to identify genuine recurring mechanical and electrical flaws.

Total Complaints
100
Defect Clusters
7 Categories
Avg Failure Range
12k mi
Est. Repair Cost
$450 – $1,400
Switch Ascent Model Year Complaints
NHTSA Defect Subsystem Breakdown

2021 Ascent Failure Distribution by Vehicle Subsystem

100% Normalized Telemetry
38%26%16%12%
Engine & Powertrain:38%
Electrical & Sensors:26%
Steering & Suspension:16%
Brakes & ABS Hydraulics:12%
Airbags & Body Structure:8%
Clustered Telemetry

Top Defect Complaint Groups (7)

Ranked by NHTSA Frequency
STEERING & SUSPENSION33 Verified Complaints

Electric Power Steering Assist & Suspension Noise Reports

Critical Severity

Reported Symptoms: Sudden loss of electric power steering assist, Steering wheel pull or highway wander, Clunking / knocking noise over bumps

Median Failure Mileage11,668 milesIQR: 6,11521,301 mi
Estimated Repair Cost$450 – $1,400 (Source: MazicBay Repair Intelligence Model)
Associated Fault Codes
TRANSMISSION & DRIVETRAIN20 Verified Complaints

Transmission Hesitation, Hard Shifting & Slipping Reports

Medium Severity

Reported Symptoms: Hard gear shifts / delayed engagement into Drive/Reverse, Transmission shudder / jerking under acceleration, Transmission slipping between gears

Median Failure Mileage40,000 milesIQR: 6,80046,500 mi
Estimated Repair Cost$1,400 – $3,800 (Source: MazicBay Repair Intelligence Model)
Associated Fault Codes
ELECTRICAL SYSTEM & BATTERY19 Verified Complaints

Electrical Parasitic Drain, Infotainment & Harness Reports

Critical Severity

Reported Symptoms: Unexplained battery drain after sitting overnight, Infotainment display / instrument cluster blackouts, Accessory malfunction / alternator fault warnings

Median Failure Mileage15,000 milesIQR: 5,00017,250 mi
Estimated Repair Cost$280 – $850 (Source: MazicBay Repair Intelligence Model)
Associated Fault Codes
ENGINE & COOLING15 Verified Complaints

Engine Stalling, Oil Consumption & Cooling Defect Reports

Critical Severity

Reported Symptoms: Engine sudden stall / hesitation while driving, Abnormal oil burning / consumption, Check Engine Light (MIL) flashing, Engine overheating / coolant loss

Median Failure Mileage67,146 milesIQR: 53,57380,718 mi
Estimated Repair Cost$950 – $3,200 (Source: MazicBay Repair Intelligence Model)
Associated Fault Codes
BRAKING SYSTEM & ABS13 Verified Complaints

Service Brakes, ABS Actuator & Master Cylinder Reports

Medium Severity

Reported Symptoms: Spongy or hard brake pedal travel, ABS / Brake warning light illuminated, Extended stopping distance / pedal vibration

Median Failure Mileage7,600 milesIQR: 7,20029,273 mi
Estimated Repair Cost$350 – $1,100 (Source: MazicBay Repair Intelligence Model)
Associated Fault Codes
AIRBAGS & SAFETY RESTRAINTS3 Verified Complaints

Airbag Occupant Detection & Inflator Defect Reports

Critical Severity

Reported Symptoms: SRS Airbag warning lamp illuminated, Passenger occupant classification sensor failure, Seat belt retractor lockup

Median Failure Mileage30,083 milesIQR: 22,62537,542 mi
Estimated Repair Cost$400 – $1,200 (Source: MazicBay Repair Intelligence Model)
Associated Fault Codes
FUEL SYSTEM & INJECTION1 Verified Complaints

Fuel Pump Pressure Loss & Fuel Delivery Defect Reports

Low Severity

Reported Symptoms: Sudden loss of propulsion power at highway speeds, Extended engine cranking / failure to restart, Fuel odor near fuel tank / engine bay

Median Failure Mileage55,000 milesIQR: 35,00075,000 mi
Estimated Repair Cost$650 – $1,250 (Source: MazicBay Repair Intelligence Model)
Associated Fault Codes