The N55 is no exception. Here are the most common BMW N55 engine problems: VANOS Solenoid Failure; Valve Cover Oil Leak; Water Pump Failure; Leaking Oil Filter Housing Gasket; Most of the BMW N55’s common problems align with many other modern BMW engines that are equipped with dual VANOS. BMW engines are also notorious for oil leaks as well. VANOS units on the intake and exhaust camshafts of a BMW N52 engine. VANOS is a variable valve timing system used by BMW on various automotive petrol engines since 1992. The name is an abbreviation of the German words for variable camshaft timing ( German: variable Nockenwellensteuerung ). The initial version (retrospectively renamed "single So, engine builder and mechanic here, including lots of BMW work. You can get cheap aftermarket kits for these cars and they'll kinda work. We only recommend OEM Vanos solenoids and reuse them over aftermarket. OP is exactly right. Duralast is a parts aggregator setup to do business solely for AutoZone. This gave me 0 confidence he did any work to the Vanos system. From what ive researched all the vanos work entails is just changing some o-rings and gaskets. BMW just used horrible quality rubber for the o-rings and seals and apparently they end up leaking oil some point in the cars life. The vanos work was in response to the code, but didn't fix it. So, either there was a problem with cam timing, and it wasn't vanos, or there's a problem with the DME. Or its view of the world (its sensors) (as to sensors, only the BMW, VDO OE or Siemens sensors seem to be any good) Sadly, the time to check cam timing is when the VANOS is off. The result is cleaner burn and more torque. When the engine is warm, the vanos maps run more overlap at low rpm again as an emissions control strategy. More overlap at cruise speeds promote "internal EGR" which reduces *** and inproves economy. However this reduces low end torque. Sistema BMW Vanos para PRINCIPIANTESBMW Vanos system for BEGINNERS and BMW Vanos system for DUMMIESDisclaimer:These videos are intended to offer general info blue boy Discussion starter. 766 posts · Joined 2013. #1 · Sep 16, 2014. was surprised when i received a letter stating that VANOS had a 10 yr warranty regardless of mileage. but not recalled. :dunno: :dunno::dunno: surely goodness and mercy will follow us all the days of our lives. 2016 320 f30. 2011 328IX. Rajaie. Vanos is a hydraulic actuator. It's part of the engine variable valve timing system. It's a metal component that mounts on the front of the engine head and connects to the camshafts and camshaft sprockets. Its job is to physically change the relative rotational position of the camshafts to the crankshaft. See also: - Pinpoint questions: Do we know what the double VANOS camshaft advance curve looks like & how does the VANOS work & what are our options if our BMW E39 VANOS seals have started to deteriorate & what parts to replace while replacing your VANOS seals & what is a reliable objective test of the before and after effect of VANOS seals & what are the meanings of the two key metrics for the Nhy9S.