BMW N47 Diesel Fuel System Replacement

Another BMW 1 Series recovered to us not starting. Cranking over but engine not firing. Vehicle in the workshop on the diagnostics it was clear we had a fuel supply problem causing the engine not to start. On the live data we could see no high fuel pressure inside the rail, before going to the injectors. Suspecting high pressure fuel pump failure we removed the fuel rail to inspect for swarf – small metal parts inside the fuel system.
As expected swarf present in the system causing damage.

Once this occurs it is good practice to replace all components on the high pressure fuel system. Along with throughly cleaning the low fuel pressure side – fuel tank, lines and filter replacement.

Unfortunately new fuel system components would write this vehicle off being several thousands of pounds. However we have great suppliers of used parts (or green parts as they’re sugar coated as) that can supply us with complete used kits of the high pressure fuel system, with a 3 month warranty. Allowing us to repair at a fraction of the cost, keeping this car on the road

Alternative solutions to repair vehicles cost effectively.

Fault investigation and diagnosis

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