I have a BMW X5 40d which I love hence 120K miles on the clock with no engine troubles until now. A rattling noise started from the engine one day unexpectedly, I took it to my usual mechanic who gave me the usual tut, tut, tut telling me this was going to be an expensive one (which I already knew) and that the job was beyond his remit - great. So I approached a local larger garage for a diagnosis - the response was "Sorry mate you have a problem in the engine which we think is piston-related it'll be about 40 hours of work, we're not equipped to carry out that type of work. We recommend 4x4 Engine Rebuilds a customer has just taken their Land Rover there and raves about them." So I picked up the phone and spoke to Kabir at 4x4 (top bloke), he listened to the problem statement and then straight away said it was the camshaft bearings. I sent the car across London on a flatbed truck, it was received and stored securely by Kabir. I visited the 4x4 garage a week later. By now I'm saying to myself I don't even know where my car is or how it's being treated. I need not worry Kabir had it secured and out of the elements under lock and key awaiting its place in the long queue. At this point Kabir advised it was going to be six weeks before I get the car back because they're so busy - I could see that with my own eyes but I was comfortable these were the guys to take care of my car. To make a long story short I entrusted 4x4 to undertake a complete engine rebuild and recondition (not cheap), they kept me updated at every step of the process with WhatsApp messages and pictures. Now I have my baby back, I'm shocked at how smooth the engine is running and let's not forget the increased torque which I'm yet to test because the new engine is being run in. 4x4 Engine Rebuilds are my guys - I will not be going anywhere else.