Maintaining the high-performance N55 engine in your F20 or F21 BMW M135i requires strict adherence to routine servicing. Powered by the 3.0-litre turbocharged inline-six engine, keeping your rear-wheel-drive hot hatch running at its peak starts here. Take the hassle out of your routine maintenance schedule with our tailored Service Kits and genuine OEM items, including Genuine BMW service parts and high-efficiency Service Filters to keep your engine oil and cabin air clean. To ensure smooth combustion, prevent misfires under boost, and maintain factory performance, we also stock high-grade replacement Spark Plugs tailored specifically for the N55 platform.