Table 1 shows nine common engine and engine cooling related problems of the 2003 Mitsubishi Montero Sport. The number one most common problem is related to the engine (one problem). The second most common problem is related to the engine belts and pulleys (one problem).
Vehicle was idling in a restaurant drive thru lane. Without warning, the engine suddenly accelerated causing consumer to rear-end the vehicle in front. Read details...
Pin in the harmonic balancer broke causing vehicle to sling a/c belt and drive belt causing harmonic balancer to seize up. Pin was replaced. Months later the check engine light began to come on showing a code of misfire. As well as harmonic balancer coming loose. Read details...
Head gasket failures on 2003 Mitsubishi Montero Sport 3. 5 l v6 engine. 1. No preceding event, car started idling rough when first started. Idle smoothes after a short time. 2. Right side head gasket started leaking coolant into cyl #2 at 30k miles, replaced under warranty. Read details...