Hyundai Santa Fe

The Theta II 2.4 GDi is also covered by the worldwide Hyundai recall. 3.9 million vehicles affected. Warranty extended to 15 years / 150,000 miles for connecting rod bearings.

Symptoms: Knocking from the engine, oil pressure drop, sudden engine stall, fire risk from metal swarf.

The G4KJ 2.4L GDi is part of the Hyundai Theta-II recall series. Metal swarf from crankshaft machining blocks oil galleries and causes connecting rod bearing failures. Affected models include various Sonata, Santa Fe and ix35 model years.

Symptoms: Metallic knocking, engine warning, oil pressure drop, engine stall

Like all Theta-II engines, the G4KJ is prone to timing chain stretch when oil changes are neglected. A jumped chain contacts valves against pistons. Workshop repair involves a complete chain kit and often cylinder head reconditioning.

Symptoms: Chain rattle on cold start, power drop, engine misfires

Like all GDi direct-injection engines, the G4KJ accumulates deposits on the intake valves. Regular engine flush or walnut-blasting every 60,000–80,000 km recommended.

Symptoms: Rough idle, acceleration stumble, P030x misfire codes, power loss.

The G4KJ tends toward measurably elevated oil consumption above 100,000 miles due to piston ring and seal wear. The class-action lawsuit against Hyundai for excessive oil consumption explicitly included the Theta engine.

Symptoms: Rising oil consumption to 0.5–1 L/1,000 km, oil pressure warning, blue smoke

A shaft seal in the transfer case wears and can lead to failure of the all-wheel drive. The seal was reinforced on the DM — still watch for symptoms.

Dirt and moisture can penetrate the ABS module and cause a short circuit with fire risk. There is simultaneously a recall regarding the hood opening unintentionally and steering wheel structural failure.

An unfavorable material pairing between the transfer case shaft and main gearbox is a known problem on the Santa Fe DM. If defective, the transfer case must be replaced completely.

From around 80,000–150,000 km, corrosion destroys the splines between the automatic transmission shaft and transfer case. Cause: inadequate sealing, assembled without grease. Repair costs 2,200–5,500 €.

The magnetic clutch on the Santa Fe DM rear axle loses function through wear. Rear wheels no longer receive power when traction is needed; vehicle plows through corners in wet conditions.

Over 11,000 Santa Fe DM vehicles were recalled due to a defective hood release cable. The hood can open while driving, causing dangerous obstruction of visibility.

The spline connection between the automatic gearbox and transfer case can shear and completely interrupt drive. Repair costs can exceed €5,000 and are often outside the warranty period.

Ball joints and driveshaft CV boots wear prematurely under the weight of the DM. The MOT regularly finds these faults on older examples and a new sticker is often refused.

The automatic transmission on the DM shows oil loss and premature wear at higher mileages. Regular transmission fluid changes are strongly recommended but are often neglected.

CV joint boots tear prematurely on the Santa Fe DM due to the high vehicle weight and AWD operation. Replacement is urgently needed, as dirt and water ingress destroys the joint.