Neither the BMW or German & Swedish filter kits include these rings, although the BMW manual (on the TIS CD) states that they must be replaced with each filter. Even BMW dealerships do not however replace them – I checked with my local dealership, who had fitted 12,000 filters in the past year, and ordered 8 (yes, eight!) small ‘O’ rings The BMW N54 engine made its debut in the 2007 E90/E92 335i. It then made its way into a handful of other models including the 135i, 535i, and Z4. The twin turbo 3.0L inline-6 direct injection engine was a totally new direction for BMW at the time. The new design also showed with a number… Oil Filter Wrench for BMW: Prior to 1994-1995, BMW recommended transmission maintenance on both automatic and manual transmissions every 60,000 miles. This involved changing the MTF or ATF; and on the automatic: dropping the pan, changing the internal filter and cleaning the magnets inside the transmission that collect metal debris. In 1994-1995, BMW started offering So it might be something more serious and beyond me so has gone off to my reliable (but increasingly familiar and quickly becoming rich) BMW specialist. The sliver lining to all of this is that there's a classic car specialist just across from the garage that always has a selection of cars to drool over and I snapped the Z1 that was sitting In all cases, the fuel filter of your Citroen Ds4 will be on the supply circuit. So it will be located between the tank and the carburetor. You can spot it thanks to its cylindrical shape with two rods and it is connected with two hoses. Finally, depending on the year, the fuel filter will sometimes be located between the two rear wheels, close This 3 series gets a new fuel pump. You easily access the pump under the rear seat. Here is the video of me diagnosing the problem Basically this P0174 code means that the upstream oxygen sensor in bank 2 reporting a lean condition (too much oxygen in the exhaust). On V6/V8/V10/V12 engines, Bank 2 is the side of the engine that doesn't have cylinder #1. The engine uses what are called O2 or oxygen sensors in the exhaust stream to determine the air to fuel ratio of the n8YEU.