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Repair Summary
This article covers replacing the crankcase pressure regulating valves in a BMW with the N62 8 cylinder engine. Even though we used a 2005 E64 645ci to perform this repair, this article can be applied to any BMW vehicle with the N62 V8 engine, including the 5,6,7 and X5 series with minor modifications to the repair steps.
See all vehicles this article applies to
E65 7 Series 735i
E66 7 Series 735Li
E60 5 Series 540i
E60N 5 Series 540i
E65 7 Series 740i
E66 7 Series 740Li
E60 5 Series 545i
E63 6 Series 645Ci
E64 6 Series 645Ci
E53 X5 Series X5 4.4i
E61 5 Series 545i
E65 7 Series 745i
E66 7 Series 745Li
E67 7 Series 745LiS
E53 X5 Series X5 4.8is
E60 5 Series 550i
E60N 5 Series 550i
E61 5 Series 550i
E61N 5 Series 550i
E63 6 Series 650i
E63N 6 Series 650i
E64 6 Series 650i
E64N 6 Series 650i
E70 X5 Series X5 4.8i
E65 7 Series 750i
E66 7 Series 750Li
If the N62 V8 engine in your BMW is starting to idle rough, and you are displaying the yellow "check engine" light on your dashboard along with an "increased emissions" message on your iDrive display, then you may need a BMW pressure regulator valve replacement.
The BMW N62 V8 engine is a reliable workhorse found in a wide range of models from 2002 through 2010. It is most notably found in the BMW 5, 6, and 7 series V8 cars of this time period, along with versions of the X5 SUV.
One of the most common problems with the N62 V8 is a rough idle situation that displays an error message on the iDrive display that there are "increased emissions" followed by the yellow "check engine light" on the dashboard. If your vehicle requires a BMW pressure regulator valve replacement, you will also most likely display the following error codes on your diagnostic scan tool: 29E8, 29F0, 29E7, 29EF, 29E8.
The BMW pressure regulator valve creates a vacuum in the crankcase that is needed to remove unwanted "blow-by" combustion gases from the engine. These gases must be removed from the engine case to ensure the proper performance of your vehicle. Over time the gasket and the spring inside the BMW pressure regulator valve become worn, allowing the pressure to increase in the engine block which triggers multiple error codes and the "check engine" light on your dashboard.
Changing out your vehicle's two pressure regulator valves is an easy repair that takes less than 30 minutes to complete. It can save you hundreds of dollars by avoiding an expensive trip to the dealership.
View the detailed parts diagram for this repair.
Includes detailed part diagrams, part numbers and links to purchase all of the required components needed to complete this repair.
Section 1 - Replacing the Pressure Regulator Valve
- Use a T30 torx T Handle (or socket) to remove the four torx bolts securing the top engine cover. Remove cover from engine bay.
- Remove side engine covers by pulling until they unsnap.
- Use a flat blade screwdriver to remove the vacuum line from pressure regulator caps.
- Use a flat blade screwdriver to remove pressure regulator cap.
- Install new springs and gaskets. Make sure caps are on tight by using the palm of your hand and pressing down. It is very important that you have an air tight fit on valve caps for proper operation.
Pressure Regulator Valve Replacement Finished
