Hyundai has come a long way, and most of the vehicles we see are solid, well-equipped cars that owners are happy with. But one topic dominates Hyundai service, and any shop that tells you otherwise is not being straight with you: the Theta II engine and its connecting rod bearing failures. We service the Elantra, Sonata, Tucson, Santa Fe, Palisade, Kona, Venue, Accent, Veloster, Ioniq and Santa Cruz.
The Theta II issue has been the subject of extensive recalls and extended warranty coverage, and knowing whether a specific vehicle is covered is genuinely worth money. We check that before recommending repairs, because a customer who qualifies for manufacturer coverage should be using it rather than paying us.
Models we service: Elantra, Sonata, Tucson, Santa Fe, Palisade, Kona, Venue, Accent, Veloster, Ioniq and Santa Cruz.
Phoenix heat matters more than usual on these engines. Theta II bearing failures are lubrication failures at heart, and oil in this climate degrades faster than the maintenance reminder assumes. A knocking Hyundai engine is the most urgent call we get on this brand, and by the time knocking starts the options have already narrowed considerably.
Interval | What we perform |
30,000 miles | Full synthetic oil and filter, tire rotation, brake inspection, cabin and engine air filters, cooling system pressure test, oil consumption check |
60,000 miles | Transmission or DCT fluid service, spark plugs, brake fluid flush, coolant condition check, four-wheel alignment, GDI carbon assessment |
90,000 miles | Full coolant flush, water pump and thermostat inspection, rear differential fluid on AWD, fuel system and injector service, full suspension inspection |
A deep knocking from the bottom of the engine that changes with RPM, often preceded by oil consumption or an oil pressure light. It affects 2.0L and 2.4L Theta II engines in Sonata, Santa Fe and Tucson models. This is the single most important Hyundai issue to know about. If you hear knocking, stop driving the vehicle – continued running turns a repairable situation into a replacement. We also check whether your VIN falls under Hyundai’s extended coverage before quoting anything.
Low oil warnings between services with no external leak. Direct-injection Hyundai engines consume oil at rates that surprise owners coming from older cars, and heat increases it. Monthly dipstick checks are not optional on these engines – low oil is precisely the condition that leads to bearing failure.
Juddering from a stop, hesitation in low-speed traffic, or a transmission warning. Dry dual-clutch designs generate heat at low speed by nature, and Phoenix traffic is close to the worst case. Clutch condition and software updates both matter, and the correct answer varies by vehicle and mileage.
Rough idle, misfires and lost fuel economy past roughly 60,000 miles on GDI engines. Fuel is injected into the cylinder rather than across the intake valves, so deposits accumulate unchecked. Walnut blasting the valves restores driveability and is maintenance rather than repair.
Hyundai’s rear suspension geometry is sensitive, and inside-shoulder wear on the rear tires of a Tucson or Santa Fe is common and rarely noticed until the tires are finished. Because we perform four-wheel alignment in house, we can measure and correct the rear – a step most tire-only shops cannot take.
Schedule your Hyundai service today. Written estimates, correct specifications, no pressure – and an honest answer if the work belongs somewhere else.
Beat the Phoenix heat with a fast, reliable AC checkup from Pete Kelley’s.
Quick, affordable oil changes to keep your engine running smooth.
Expert engine diagnostics and repair from Phoenix’s local experts.
Restore performance and quiet the ride with expert exhaust repairs.
Stay safe on the road with thorough brake inspections and repairs.
Expert transmission care to keep your ride shifting smoothly.
Battery testing and electrical repairs, done right the first time.
Prevent overheating with cooling system repairs from Pete Kelley’s
It depends on the exact model, year and VIN. Hyundai extended coverage on many affected engines. We check this before quoting any engine work, because if your vehicle qualifies you should be using that coverage rather than paying for the repair.
Stop driving it and have it inspected. Bottom-end knocking on a Theta II engine progresses quickly, and continuing to drive typically eliminates the less expensive repair options.
Elantra, Sonata, Tucson, Santa Fe, Palisade, Kona, Venue, Accent, Veloster, Ioniq and Santa Cruz.
Yes, particularly for Theta II era vehicles. We check for oil consumption, engine noise, service history evidence and whether the vehicle falls under any extended coverage. It is one of the higher-value inspections we perform.
Free written estimate. No pressure. Honest advice from a shop that has been on North Central since 1972.