2021 Hyundai Tucson Common Problems & Defect Telemetry
Authoritative defect intelligence synthesized from 77 verified NHTSA owner complaints, 1 federal safety recalls, and interquartile failure mileage telemetry.
The 2021 Hyundai Tucson receives a 7.6/10 MazicBay Reliability Index based on 77 verified NHTSA federal complaints and 1 safety recalls. The primary reported failure mode is Engine Stalling, Oil Consumption & Cooling Defect Reports with a median failure point at 53,650 miles (IQR: 32,325 – 71,766 mi). Out-of-warranty repairs benchmark at $950 – $3,200 .
4.4 complaints / 10k sold
Verified US federal records
Crash, fire & stall audit
1 Active / Free Remedies
Top Reported Problem Clusters (6)
Engine Stalling, Oil Consumption & Cooling Defect Reports
- Engine sudden stall / hesitation while driving
- Abnormal oil burning / consumption
- Check Engine Light (MIL) flashing
- Engine overheating / coolant loss
“The contact owns a 2021 Hyundai Tucson. The contact stated that while driving at an undisclosed speed, the engine blew. No warning lights were illuminated. There was white smoke coming from the hood of the vehicle. The vehicle was towed to the dealer; however, the vehicle was ...”
“This vehicle burns oil at an alarming rate. I am getting oil changes every 3K miles, and when I take it in, the dipstick is dry. I receive no oil lights to tell me it is low. I just had to get spark plugs and the mechanic at the garage told me this was due to the oil consumpti...”
“I was driving down ... from my house.My engine light started to flash.I tried to accelerate my car barely went 10 miles an hour.I got Home 2 minutes later.There was major knocking.I had the car towed to ..., Hyundai, the only code that is showing up on the diagnostics, is P132...”
Service Brakes, ABS Actuator & Master Cylinder Reports
- Spongy or hard brake pedal travel
- ABS / Brake warning light illuminated
- Extended stopping distance / pedal vibration
“Forward crash avoidance system keeps activating causing the car to brake on it's own. This was previously fixed on my car once back in 2022 and now in 2026 it is happening again. I have been trying to communicate with Hyundai regarding additional years to current recall but th...”
“Vehicle stalled approximately 15 times between April 17 and May 4, 2026, including once on Interstate XXX at approximately 50mph with minor children ages ... and ... in the vehicle. The oil and battery lights illuminated simultaneously at each stall. Diagnosed as ABS module fa...”
“In October 2025, while the vehicle was still under Hyundai’s 5-year warranty, an authorized Hyundai dealership diagnosed a significant electrical failure affecting the ABS/ESC system on my 2021 Hyundai Tucson. The vehicle was experiencing multiple dashboard warning lights, int...”
Electrical Parasitic Drain, Infotainment & Harness Reports
- Unexplained battery drain after sitting overnight
- Infotainment display / instrument cluster blackouts
- Accessory malfunction / alternator fault warnings
“Vehicle stalled approximately 15 times between April 17 and May 4, 2026, including once on Interstate XXX at approximately 50mph with minor children ages ... and ... in the vehicle. The oil and battery lights illuminated simultaneously at each stall. Diagnosed as ABS module fa...”
“In October 2025, while the vehicle was still under Hyundai’s 5-year warranty, an authorized Hyundai dealership diagnosed a significant electrical failure affecting the ABS/ESC system on my 2021 Hyundai Tucson. The vehicle was experiencing multiple dashboard warning lights, int...”
“The AC system on my vehicle stopped working with less than 55,000 miles on it. When replacing the compressor, condenser, all AC switches, and lines (the entire AC system besides the ECM), the AC is still not working. The compressor is not kicking on. I have an ECM on order, bu...”
Transmission Hesitation, Hard Shifting & Slipping Reports
- Hard gear shifts / delayed engagement into Drive/Reverse
- Transmission shudder / jerking under acceleration
- Transmission slipping between gears
“The vehicle experienced a catalytic converter efficiency failure that was confirmed by an authorized dealership in January 2025. The dealer indicated the catalytic converter required replacement; however, the replacement was not performed, and the vehicle was returned to servi...”
“When sitting at a stop and then accelerating to leave the stop position, the car will go and then all of a sudden it will stall out and I'm pressing the gas pedal, pressing the gas pedal quite a few times before the car even decides to move. This happens when I'm changing lane...”
“Vehicle has 36,300 miles. Engine stalled twice when shifting into reverse, MID displayed "BCW On, Check System." Continued driving home, vehicle experiences power loss (rpms drop to ~500) and electrical system sputters and sparking noises can be heard in the cabin momentarily ...”
Electric Power Steering Assist & Suspension Noise Reports
- Sudden loss of electric power steering assist
- Steering wheel pull or highway wander
- Clunking / knocking noise over bumps
“Vehicle has 36,300 miles. Engine stalled twice when shifting into reverse, MID displayed "BCW On, Check System." Continued driving home, vehicle experiences power loss (rpms drop to ~500) and electrical system sputters and sparking noises can be heard in the cabin momentarily ...”
“What component or system failed or malfunctioned, and is it available for inspection upon request? Steering column. How was your safety or the safety of others put at risk? Steering column would not disengage and remained locked up after the vehicle was started and in gear. Th...”
“I've had numerous issues with my vehicle, including power steering, brakes, loss of power, and more. On a few occasions, I started my vehicle and put it into drive, only to find that the power steering hadn't disengaged. This led to near collisions, such as almost hitting anot...”
Airbag Occupant Detection & Inflator Defect Reports
- SRS Airbag warning lamp illuminated
- Passenger occupant classification sensor failure
- Seat belt retractor lockup
“On ..., the vehicle was involved in a complex multi-impact accident. It was struck by a vehicle on the passenger (right) side and, simultaneously, by another vehicle on the driver's (left) side. (Police Report). During this sequence of collisions, and despite the magnitude of ...”
“The driver side and center seat belts in the back seat don’t secure. The buckle just slides back out. They’ve apparently been like that since I bought the car in 2020 and just recently had a passenger in one of those seats.”
“AIR BAG ON DRIVERS SIDE DID NOT OPEN SAME THING WITH MY 2019 ELANTRA 3 YEARS AGO”
Official NHTSA Safety Recalls (1)
SERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ELECTRONIC LIMITED SLIP:CONTROL UNIT/MODULE
Summary: Hyundai Motor America (Hyundai) recalled certain 2019-2021 Tucson vehicles on September 4, 2020. On December 30, 2020, Hyundai expanded the recall population, and added certain 2016-2018 Tucson vehicles. The Anti-lock Brake Hydraulic Electronic Control Unit (HECU) could corrode internally and cause an electrical short, possibly resulting in an engine compartment fire.
Pre-Purchase Inspection Checklist for 2021 Hyundai Tucson
Before purchasing a used 2021 Hyundai Tucson, perform the following targeted inspections based on reported federal defect patterns:
Scan the OBD-II port under the dash for pending freeze-frame codes (e.g. P0300 misfires, P0087 fuel rail pressure, P0420 catalytic efficiency).
Test vehicle at low-speed stop-and-go and highway merges. Check for delayed reverse engagement or gear shift shudder between 2nd and 3rd gears.
Verify that all 1 NHTSA safety recall campaigns have been performed by an authorized dealership using the VIN.
Ensure the instrument cluster, center screen, and auxiliary charging ports operate with stable 12.0V–14.4V alternator voltage.
Defect & Reliability Q&A: 2021 Hyundai Tucson
Is the 2021 Hyundai Tucson a reliable used car?
The 2021 Hyundai Tucson earns a 7.6/10 MazicBay Reliability Index based on 77 federal owner reports. Vehicles maintained under factory service schedules exhibit strong longevity past 150,000 miles.
What is the most frequent defect reported on the 2021 Hyundai Tucson?
The leading complaint category is Engine Stalling, Oil Consumption & Cooling Defect Reports, with a median failure point around 53,650 miles (IQR: 32,325 – 71,766 mi).
Are there free recall repairs available for the 2021 Hyundai Tucson?
Yes, the NHTSA records 1 safety recall campaign(s) for this model year. All safety recalls are performed 100% free of charge by authorized franchise dealerships regardless of vehicle warranty status.