I bought a 2006 Mazda 6 diesel in January of this year. The car had done 85000 miles and was sold to me with a 12 month warranty by a local independent dealer.

Within about a month an oil leak had developed which caused the brake system vacuum pump to fail.

The dealer was happy to get this sorted and pay for it so I took it to their preferred independent mechanic.

The oil leak was fixed and the vacuum pump replaced, however, it was discovered that there was no oil getting to the pump due to a clog.

The engine was flushed and flushed again and on the 8th or 9th flush it seized. At this point I had been without a car (and no courtesy car) for 2 - 4 weeks.

I was told a new engine was required and the dealer wanted to go ahead and fix it, the dealer sourced a new engine which arrived over the weekend.

However, the engine arrived and was not complete so all my parts had to be transplanted to the new (nearly new) engine. This process took several weeks. When it was finally done it wouldn't run on its own and after another few weeks of diagnostics it was taken to the nearest Mazda dealership who got it running by reprogramming the ECU.

The car was finally running again two weeks ago. However, it had a fault code and was stuck in limitted 'limp home' mode. The fault was the cam sensor, and the independent mechanic fitted new wires and a new sensor but to no avail. Eventually it went back to Mazda and on Friday I was told that there was an issue with the flywheel and the gearbox will have to be removed to find out if this is true but there is no certainty about whether this will fix the issue.

I have now been with the car since 20th February and paying monthly payments on the finance and insurance.

I was told this morning that the dealer has approved the work but it is going to be at least two weeks before I even know if the problem is solved.

I want to ask what my options are here?

I still don't have any certainty about when it might be fixed, although I loved the car in the month I had it, I have now lost confidence that this, even if it is fixed, is going to be the reliable mazda I was hoping for.

If the dealer is willing to keep paying for repairs indefinetly what are my options, where do I draw the line and demand my money back? Or should I have done that weeks ago? The mechanic told me this morning that had he been the dealer he would've pulled the plug weeks ago.

Any help would be greatly appreciated, I'm really at the end of my tether here.