Hyundai ix55

V6 diesel with six piezo injectors, which are susceptible to wear and leaks at high mileage. Replacement costs are considerable due to six units.

Symptoms: Rough running, engine stuttering, poor cold start, excess fuel consumption, P0201–P0206 fault codes.

The V6 diesel uses two turbochargers. Soot particles from defective injector seals clog the turbo oil lines, leading to bearing damage and potential complete failure of both turbos.

Symptoms: Severe power loss, loud turbo noise, blue smoke, oil pressure warning.

The dual timing chain on the D6EA can last to 200,000 km, but the chain tensioner is a known weak point. A sudden chain skip without prior warning is possible and causes engine damage.

Symptoms: Rattling on cold start, engine noise, in worst case engine failure

The EGR system on the D6EA is especially prone to heavy fouling in short-trip use. A stuck EGR valve impairs the turbo's throttle response and causes rough idle.

Symptoms: Rough idle, poor throttle response, power loss in the lower RPM range, fault code P0403.

CRDi injectors are individually coded and must be learned into the ECU after installation. Incorrect or missing coding causes misfires and rough engine running.

Symptoms: Rough running after injector replacement, increased fuel consumption, rough idle, check engine light.

The EGR system on the D6EA V6 CRDi is prone to heavy soot contamination of intake ports and sensors. This leads to power loss and increased fuel consumption.

Symptoms: Power loss, increased fuel consumption, check engine light, rough idle

A recall was issued for the ix55 EN due to a faulty brake light switch. Brake lights may fail to illuminate on brake pedal actuation or may remain permanently on, increasing accident risk.

A known recall for the ix55 EN concerns possible short circuits in the ESP control unit that can in rare cases cause vehicle fires.

The ix55 EN shows heavy rust on the rear axle and body at higher mileages. Before MOT, brakes, exhaust and extensive rust removal are often needed. Complete axle removal for rust treatment may be required.

From around 130,000 km some ix55 EN models show sluggish automatic gearbox shift behaviour. The engine revs to 4,000 rpm before shifting. Gearbox oil change often helps temporarily.

On the ix55 EN the ABS/ESP warning light activates while stationary due to a faulty steering angle sensor. The system may be inoperative when the vehicle is first driven.

The ix55 EN with V6 engine develops oil leaks from valve cover gaskets and transaxle shaft seals with age. Oil can reach the exhaust and cause fire risk or smoke.

The automatic gearbox on the ix55 EN frequently revs to 4,000 rpm before upshifting despite light throttle input. Electronic problems with gearbox sensors lead to inappropriate shift behaviour.

Brake discs on the ix55 EN rust heavily when standing and on vehicles moved little in stop-and-go conditions. Seized brakes through surface rust can cause jerking when braking.

Shock absorbers and springs on the ix55 EN wear after 100,000 km especially with frequent load carrying or light off-road use. Worn control arm bushings lead to imprecise steering.

The automatic gearbox on the 3.0 V6 variant doesn't shift at the right time — revs to 4000 rpm under light load before shifting. Diagnosis frequently points to electrical connection problems at gearbox sensors or throttle position sensor.

Brake light switch can fail and cause brake lights to be permanently on or off. Recall 2009 by Hyundai — affected vehicles should be checked for recall completion.