Toyota HiLux 2012 Problems

To fully answer that I would need to know more about the car; is it a 4WD, dual-cab, which diesel engine, and its condition and price, but in terms of longevity and reliability the Hilux diesel is generally a good deal. The key to future reliability is regular servicing, so make sure the car you buy has been regularly serviced and hasn’t been neglected in any way.

No, you don't have to put up with it. It shouldn't be disengaging simply when you drive over a bump or similar, there is something wrong with it and as the person who fitted it the dealer is responsible for fixing it. Take is back and demand action; you have been sold a dud product.

The best engine for economy is the 3.0-litre turbo-diesel. The 4.0-litre V6 is a great engine, but it does consume a fair amount of fuel. In terms of reliability they are much the same. On average they would have done between 100,000 and 150,000 km. Pricewise they would average $28,000-$31,000. The main thing to look for is any sign of hard work or heavy off-road use.