Mitsubishi ASX 1.6 DI-D GA

The DV6C engine's DPF requires sustained driving above 40 km/h for at least 20 minutes to complete regeneration. On predominantly short-trip use, the DPF accumulates soot faster than it can burn off. Failed regenerations dump extra fuel into the combustion chamber during the exhaust stroke, and unburnt diesel washes past the piston rings into the sump, diluting the engine oil. This triggers a P252F fault code (oil level too high). If left unchecked, diluted oil provides insufficient lubrication and can cause premature engine wear. Professional DPF cleaning costs approximately €250-400 plus labor. Full DPF replacement with an aftermarket unit costs €500-800 fitted, or €1,000-1,500 for an OEM unit. Prevention is straightforward: drive on the motorway for at least 30 minutes once or twice per month.

The EGR valve recirculates exhaust gases back into the intake to reduce NOx emissions. Over time, carbon deposits from the recirculated gases accumulate on the valve and in the intake manifold. This restricts airflow and causes rough idle, hesitation on acceleration, and eventually fault codes and limp mode. The issue typically appears between 80,000-120,000 km and is worse on cars driven primarily in stop-and-go traffic. Cleaning the EGR valve costs €100-200 at an independent shop. If the valve is seized or internally damaged, replacement costs €250-600 including the valve and labor. Aftermarket EGR valves are available from €70-130, OEM units from €150-350.

The DV6C uses a variable geometry turbocharger (VGT) with internal vanes that adjust to optimize boost across the rev range. If the car is driven too gently or mostly at low speed, carbon deposits can cause the vanes to stick. This manifests as intermittent power loss, boost control faults, and occasionally limp mode. The DV6C (8-valve SOHC) version is significantly more reliable in this regard than the earlier 16-valve DV6 TED4, which had notorious turbo failure rates. However, the issue still occurs on neglected cars or those used exclusively for short trips. A waste gate or vane mechanism repair at a specialist costs €800-1,200. Full turbo replacement runs €1,500-2,200 fitted with a new or remanufactured unit. Expected turbo lifespan under normal use is 120,000-180,000 km.

This is a well-documented issue affecting all ASX variants regardless of engine choice. The tailgate develops rust around the boot switch area and between the upper and lower panels, caused by uneven sealant application at the factory that allows water ingress. Early signs are paint bubbling around the switch. The problem affects cars from all production years but is most commonly seen on 2010-2015 models. If caught early, a localized repair costs €300-500. If the corrosion has spread between panels, a full tailgate respray or replacement runs €800-1,200. Mitsubishi's perforation rust warranty (typically 12 years in Europe) may cover the repair on newer examples, so check eligibility with a dealer before paying out of pocket.

The DV6C engine's common-rail fuel injectors can develop electrical faults or suffer from deteriorating copper seals. Forum reports describe injector coil resistance dropping well below specification (10-20 kohm instead of the correct 200 kohm), causing misfires and rough running. The copper seals between the injectors and the cylinder head can also deteriorate, allowing combustion gases to leak. A single injector replacement costs approximately €200-400 including coding to the ECU. If multiple injectors fail simultaneously or the injector seats are damaged, the total bill can reach €1,200-1,800. Using clean fuel and replacing the fuel filter at every service interval (15,000 km) significantly reduces the risk.

The ASX front suspension uses MacPherson struts with separate anti-roll bar links and lower control arms with integrated ball joints. Anti-roll bar links are the most common failure point, producing a knocking sound over bumps. These are inexpensive at €20-40 per link plus €50-100 labor per side. Lower ball joints and strut top mounts also wear, especially on cars used on rough roads. TUV inspectors frequently flag these items. A full front suspension refresh with links, ball joints, and strut mounts costs €300-700 depending on how many components need replacement.