2020 Hyundai Tucson Problems: 7 Known Issues

On the 2019-2021 Hyundai Tucson, on 2019-2021 Tucson, the Mando-supplied ABS hydraulic electronic control unit can short internally and ignite an engine-bay fire while parked or driving. Supplier analysis found soldering flux residue left on the HECU main controller board; heat and humidity let that residue corrode the board and create an electrical short. Hyundai filed the recall after 12 documented fires (nine in 2019 models, two in 2020, one in 2021). Hyundai issued a park-outside-away-from-structures warning because the module stays powered with the ignition off. A follow-on equipment recall (21E038) covered the Mando modules themselves. This is an ABS/electrical defect and is unrelated to the engine or fuel system.

On the 2016-2025 Hyundai Tucson, the panoramic sunroof glass on the Tucson can crack or shatter spontaneously without impact. The issue has been reported across multiple model years and has generated significant NHTSA complaints. Thermal stress from temperature differentials and body flex during driving are suspected contributing factors. The large glass panel size makes it more susceptible to stress fractures originating from the bonded edges.

On the 2011-2022 Hyundai Tucson, turn-key Tucsons built without an engine immobilizer can be started by stripping the steering column, exposing the ignition cylinder and turning it with a USB cable or similar metal object - no key code is ever checked. The vulnerability, popularized as the 'Kia Challenge' on TikTok, made these vehicles theftable in under 90 seconds and drove insurers in several markets to refuse or surcharge coverage. It is a design omission, not a wear failure: Tucsons from 2011 through 2022 are in the eligible population, and only lower trims with a mechanical key are affected - push-button-start vehicles already had an immobilizer. A class-action settlement valued at more than $200 million resolved owner claims.

On the 2016-2023 Hyundai Tucson, rear brake calipers on Tucson models are prone to seizing due to corroded slide pins, causing uneven pad wear, pulling to one side, and premature rotor warping. The issue is worse in northern climates with road salt exposure. Some owners report rear brakes needing replacement at only 20,000-30,000 miles.

On the 2010-2021 Hyundai Tucson, the electromagnetic coupling unit for the AWD system in Tucson models can fail, causing loss of rear-wheel drive engagement. Symptoms include grinding noise from the rear, AWD warning light, and reduced traction in slippery conditions. The coupler motor or the coupling assembly itself wears out prematurely.

On the 2010-2021 Hyundai Tucson, the A/C compressor on the Tucson has a higher-than-average failure rate. The compressor clutch can fail first, making a screeching or grinding noise, followed by complete compressor seizure. When the compressor fails internally, metal debris contaminates the entire A/C system, requiring a full system flush. The condenser is also prone to developing leaks from road debris impact.

On the 2017-2021 Hyundai Tucson, certain 2017-2021 Tucsons finished in Dazzling White (PDW) or Cream White (WW2) shed clear coat in sheets. The failure is delamination: the clear layer never bonded properly to the white base at the factory, typically because the base was sprayed thin, so the clear lifts at an edge and peels away in large patches. Horizontal, sun-exposed panels go first - roof, hood, and the tops of the fenders and liftgate. Owners describe it as peeling skin after a sunburn, and it is progressive rather than a chip-driven cosmetic issue. It affects Tucson alongside Sonata, Elantra and Santa Fe Sport, and has been reported in the US, Canada, Australia and South Africa. Following consumer-affairs news investigations Hyundai extended paint coverage rather than issue a recall - this is not a safety defect, but it destroys resale value. It is distinct from the interior pull-handle trim paint peeling issue.