This article gives detailed instructions on replacing the camshaft position sensors in a BMW vehicle with the N52 6 cylinder engine. Even though we used a 2006 530xi to perform this repair, this article can be applied to any BMW vehicle with the N52 engine including most 2004-2013 1, 3, 5, 6, 7, X1, X3, X5, and Z4 models minor modifications to the repair steps.
A faulty BMW N52 camshaft sensor will usually cause erratic engine surges and a lack of power.
There are two camshaft sensors in the BMW N52 six-cylinder engine and they have a very straightforward job; they monitor the position of the intake and exhaust valves and report the data to the engine control module (ECM). This data is used by the ECM to determine the proper fuel, air, and spark needed to keep the engine running at its peak performance.
Over time, age and the brutal engine heat take their toll on the sensors causing them to fail. The following image shows the camshaft sensors removed from a 2006 530xi with 130,000 miles. The sensors have actually begun to melt from the heat seriously affecting their functionality.
The tell-tale sign that the camshaft sensors are failing in your N52 six-cylinder engine is a "Service Engine Soon" error light in the instrument cluster with a camshaft position sensor error code on the diagnostic scanner. Camshaft position error codes may be one of the following: 2AA0,2A9a,2B62,2A9E,P0345,P0346,P0347 or P0348. Other signs that a camshaft sensor has failed in your N52 engine include a noticeable loss of power (especially while accelerating) and erratic engine surges. Please be aware that these symptoms can also be indicative of failing a failing VANOS solenoid(s). The BMW Repair Guide strongly recommends replacing your VANOS solenoid valves with the camshaft sensors when performing this repair. For more information on replacing your VANOS solenoids, please see our article BMW N52 VANOS Solenoid Replacement – 1,3,5,6,7,X1,X3,X5,Z4 6cyl..
The BMW N52 camshaft sensors are located on the front of the engine and are easily accessible without removing any parts. This is a simple repair for the home mechanic and will avoid a costly trip to the repair shop or dealership.
Fits BMW N52 six-cylinder engines
Replacing your camshaft position sensors is an inexpensive way to restore power back to your N52 six-cylinder engine. These sensors are OEM quality for a fraction of the cost of factory replacements.
BMW N52 six-cylinder engines
New camshaft sensors do not include the o-ring gasket. Always use new o-rings when replacing your camshaft position sensors!
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