2018 Hyundai Santa Fe: What to check before buying

Oil burning that ends in a seized or blown engine is the dominant pattern, often with no warning light. Many reports describe about 2 quarts lost every 1,000 miles, fouled spark plugs, and knocking before a connecting rod breaks or the engine locks up. Failures cluster between roughly 83,000 and 123,000 miles, several just past warranty, with replacement quotes of $12,000 to $20,000. Stalls at highway speed leave drivers coasting in traffic, one unable to steer. Three reports involve fire, including leaking fuel injectors.

Oil disappears with no leak and no warning until the dipstick is dry. Reports describe smoke from the exhaust, consumption as high as 2 quarts every 700 miles, and fuel getting into the crankcase. Several engines stalled at around 65 mph with scraping or clicking, later traced to failed pistons and rods. One lost power and needed a long block and turbo. Failures show up between 58,000 and 120,000 miles, and dealers usually call for a full engine replacement.

Most of these filings concern brake recall 22V056000, where dealers could not get the repair part and owners waited well past a reasonable time. Separate reports describe real brake failures: the pedal goes hard, the car slides or does not slow, and ABS and parking brake lights come on together. One repair found failed master cylinder and booster seals. Others report the car braking on the highway by itself. Three filings involve crashes.

Fires and smoke in the engine bay, sometimes while parked and switched off, make up five of these reports. A recurring cause is a leaking oil pressure switch or sensor that sends oil through the wiring harness, damaging electrical parts and dripping on hot surfaces. Starters fail at low mileage, between 25,000 and 60,000 miles, and some cars intermittently refuse to crank. Smaller complaints include a reverse camera stuck on a blue screen and dead taillights tied to a tow hitch harness.

Hesitation and stalling while pulling out or turning from a stop show up in nearly new cars, one of which was T-boned and totaled. The car stays unresponsive for a second or two, then lurches. Older cars show the familiar oil burning, knocking, metal shavings, and connecting rod failure. CVVT bolts backing out and puncturing the valve cover caused limp mode in one case. Owners, including second owners, report warranty denials, with repair quotes from $7,000 to $13,000.

Pulling away from a stop sign or light, the car often fails to respond to the gas pedal for a second or more, then jerks forward. Many of these cars had under 12,000 miles. Some owners report the engine revving high while the car barely moves, or RPMs surging on cruise control downhill. Dealers often cannot reproduce it and find no codes. One report describes the SUV surging forward in a drive-thru and hitting the car ahead despite hard braking.

A loose wheel that pops over rough pavement, or feels ready to come off, is the main complaint. These reports tie to a recall for the wheel separating from the column. Some owners were told their VIN or assembly lot was not covered, and one later found the assembly cracked. A second pattern is sticky handling above 60 mph, where small corrections meet resistance and then overshoot, making it hard to hold a straight line.

Airbags fail to deploy in serious side impacts. Three crash reports describe no deployment, two with injuries. The other common fault is the passenger seat occupancy sensor, which does not detect a seated adult and keeps the airbag light on. Replacement parts for that sensor have been on back order for over a year for some owners. One driver paid $2300 after a shorted seat belt pretensioner took out the airbag module.

Headlights cast dark spots and shadows that hide the left lane or the roadside at night. Hyundai described this as a design feature, not a defect. Other reports describe headlights cutting out during a turn, traced in one case to the multifunction switch at 58,000 miles. In a rental, headlights and dash lights went dark together and the car left the road, injuring two people. Minor issues include a dead brake light and fogged lenses.