The BMW F30 3 Series Sedan 320i has a Inline 4, Petrol engine with 1997 cm3 / 121.9 cu-in capacity. Is BMW F30 fuel efficient? BMW 3 series F30 sedan average fuel consumption in combined cycle for petrol engine is from 5.3 to 8.2 litres per 100km, whereas for diesel engine – from 4.1 to 5.4 litres per 100km. Step 8. Next, pull the coil out. I work on 1 coil at a time. Pull the coil out, loosen the old spark plug. I use a regular wrench with an 8" extension bar to loosen the old spark plug. Toward the back of the engine near the fire wall, you will need a 10" bar extension to remove the last 2 plugs. In this article, we will cover everything from the importance of spark plugs and their role in your BMW’s engine, to the different types of spark plugs available for the 2008 BMW 328i. We will also discuss the signs that indicate it’s time to replace your spark plugs, as well as the step-by-step process of replacing them yourself. This is the OEM NGK spark plug used in the N20 and N26 turbocharged four-cylinder engines. It's also used as an upgrade in highly modified N54 engines. NGK is an original supplier to BMW for spark plugs and other ignition components and this plug meets all of the original specs. Having the correct plugs in your car ensures optimal performance OEM for many models. This is a OEM Bosch spark plug standard on many BMW engines, mostly from 1996-2006, including M52TU, M54, and M62TU. It's also the standard plug for M42 engines used in E30 and E36 318i models. This is the "High Power" spark plug with platinum tipped electrodes for longer service life. Overview of Essential BMW 320i Maintenance Needs. Head to your nearest Firestone Complete Auto Care in your 2014 BMW 320i for factory-recommended routine maintenance and our technicians will jump right in with a Courtesy Check. A Courtesy Check helps "set the stage" for your service and catch any small problems before they turn into big repairs. 1. Removing and installing spark plugs. - The best tool for removing spark plugs from the B46 engine is a 3/8" ratchet with an extension and magnetic spark plug socket. This will help avoid breaking the spark plug off inside the tube. - Using a 14mm magnetic swivel spark plug socket, remove the spark plug 12120040551 from the cylinder head. Brian Eslick from How to Automotive http://www.howtoautomotive.com/ takes you step-by-step through the process of removing BMW spark plug tube seals on a N54 Talent. Tools: Set of sockets, 12 point spark plug socket, 5/8-inch thin-wall spark plug socket, flathead screwdriver, torque wrench. Parts Required: Spark plugs, Ignitions coils. Performance Gain: Engine runs well. Complementary Modification: Change air filter at same time. To conclude : the maintenance of the spark plugs is very important for your engine especially if you have a petrol engine on your Bmw Serie 3 E90. So be sure to check them on average every 30 000 km and replace them around the 60 000 km and for a motor Diesel you can wait for the 100 000 km. Stay all the same attentive to warning signs. 1LFXgv.