My 2015 Mazda CX-5 Diesel, at 148,000km, broke down while driving, with the oil light coming on. It has been assessed and determined it needs a new engine due to suspected fuel injector leakage, filling the sump with diesel. Is this a common problem with diesel CX-5s, and would it be claimable with insurance or should I contact Mazda directly? Thank you in advance.
The problem of the sump filling with diesel was not unknown on early CX-5 diesels. A leaking injector is possible, but the main cause of this was believed to be the car’s DPF regeneration process dumping large amounts of fuel into the engine, some of which finds its way past the piston rings and into the sump. Either way, a new engine is a large expense.
There’s every chance that Mazda won’t offer any help given the age of the vehicle, nor is this type of engine damage usually a cause for an insurance claim. It would definitely be worth contacting Mazda Australia’s customer service division, but don’t hold your breath.