MINI R56 Fuel Injector Replacement – 2006-2013 Cooper – N12 (Non-Turbo)

It is well known that the N12 engines found in the second generation MINI Cooper have issues. Fortunately, the majority of these problems can be avoided by following a strict maintenance schedule. Changing out the fuel injectors in your MINI Cooper is a good example of a repair that should be done long before you start encountering misfiring cylinders and "check engine" lights on the dashboard.

The fuel injectors in your MINI N12 four-cylinder engine are simple solenoid valves that pump a fine mist of pressurized fuel into the cylinder. Over time these valves can become clogged from fuel hydrocarbons and additives, restricting their flow and severely affecting engine performance. Signs of dirty fuel injectors are rough idling, difficult engine starting, failed emissions, misfiring cylinders, smoke emanating from the tailpipe, and overall poor engine performance.

Even though there isn't a suggested maintenance interval for fuel injectors in the MINI Cooper Service and Warranty Information guide, the BMW Repair Guide recommends that they are replaced every 100,000 miles to avoid any of the engine issues listed above.

A MINI R56 fuel injector replacement is actually a relatively simple procedure that can be easily done by any capable home mechanic. It does not require putting the MINI in its "service position"; the fuel rail and injectors can be easily accessed from the engine compartment.