6 months after I purchased a new Mitsubishi Outlander the engine warning light started coming on intermittently whilst I was away in Sydney on holiday. I took the car to a Mitsubishi dealer at Penrith and they told me that they could find nothing wrong with it, but that I should take it to my local dealer when I returned to Brisbane. On returning to Brisbane I took the car to my local Mitsubishi dealer at Capalaba and once again I was told that they could find no fault with the car and that I should try using octane booster every now and then when I filled the tank. The octane booster helped for a while but then the light started coming on again. During one of my first few services I again asked the dealer to check for problems because the light was still coming on intermittently and I was using the octane booster regularly. By the time the service people looked at the car the light was no longer on and once again they said they could find no problem. They asked me to return the car to them when the light was on and they would take a look at it straight away. A few weeks later the light was on and I took the car back to Mitsubishi to check. Once again I was told that they could find no problem. I remarked to my wife at the time that they will probably find a problem once the car is out of warranty, and then they will expect us to pay to have it fixed. Before the car was even two years old I once again asked Mitsubishi to check the light during a routine service. By this stage the light was on more than it was off. Once again they assured me there was no problem. The car is now 7 years old and I have put up with the “check engine” light being on more than it is off for the last 3-4 years. So guess what happened during a recent recall for another faulty part. That’s right, we were told that they had detected a faulty oxygen sensor and this is why the engine light was on. The cost to fix it is a hefty $600.00. After relaying the history of this vehicle to the service guy at Barton’s Mitsubishi Capalaba he kindly put in a request to Mitsubishi Motors for a good will warranty repair. - The car was faulty from around 6 months after I purchased it - I brought the fault to the attention of the dealer immediately - I repeatedly took the car back to the dealer and was repeatedly told that there was no problem. Adding to the above, I now find that for many Mitsubishi models, faulty sensors have been a known problem since at least 2005. Should be a no brainer you would think. The problem was reported whilst the car was under warranty. It was a known problem with Mitsubishi at the time but the dealer didn’t disclose this and told us there was no problem, but Mitsubishi won’t fix the problem. I should be putting in a claim to them for all the octane booster I have purchased that wouldn’t have been necessary if the car was not faulty since it was new. Mitsubishi knocked back the claim, only saying that the car is now out of warranty. This is how large corporations lose respect, lose customers and eventually get into financial difficulties. I will never purchase another Mitsubishi and I hope that by sharing this information more people will be wary about purchasing anything from a company that hides it’s problems and will only make restitution when they start to get too much publicity. Here are some websites showing the problem dating back to 2005. http://www.breakeryard.com/mitsubishi-car-parts/outlander/common-problems-with-mitsubishi-outlander Problem: One of the front oxygen sensors is known to fail on this vehicle. The Outlander has a pair of oxygen sensors on the front of the engine and a pair on the rear. It will most likely be one of the front ones that fail