The VANOS system is an innovation specific to BMWs that has been around since the early 90’s. This system revolutionized the way driving felt, creating a smoother yet more powerful feel that enticed drivers. In fact, without many of us realizing it, the VANOS system is part of what makes BMWs so beloved world wide, as it is a defining factor in what makes these stunning cars so amazing to drive.
With this in mind, we will take a closer look at the VANOS system, find out what it is, learn some of the error codes which can help you diagnose issues, and discuss some tips and tricks you can use to try to repair a malfunctioning system.
What is the VANOS system?
VANOS is an abbreviation of the German words “VAriable NOckenwellen Steuerung.” It is BMWs interpretation of the engine variable valve timing unit. BMW introduced the VANOS system in 1992. It is designed to help improve engine performance through modifying both the engine intake and exhaust valves, allowing both parts to open and close reflexively as your drive. This provides improved engine performance.
The VANOS system offers your BMW smoother idling as well as an increase in torque and a more elastic powerband. The VANOS system also includes solenoids, which are in charge of controlling the flow of oil to the cam gears. This ensures the timing adjustments are accurate.
Types of VANOS System
There are 3 types of VANOS system, and each of which can have their own inherent faults, so first, let’s take a look at an overview:
1992-2000 in 6-cylinder M50, M52, & S52 engines
1999-2002 in V8 M62TU engines
1999-2005 in 6-cylinder M52 TU, M54, & S54 engines
2004-2010 in 6-cylinder N54
Double VANOS with Valvetronic
2004-2010 in 6-cylinder N52 & N55
2004-2010 in V8 N62 & N62 TU engines
2005-2015 in V12 N73 & N74 engines
If your VANOS system becomes faulty, your BMWs onboard computer will inform you of this failure using fault codes. Listed below are some of the common fault codes on all three systems you may notice. This will also tell you what they mean, allowing you to respond accordingly.
- P1520: Camshaft position actuator, exhaust
- P1523: Camshaft position actuator is jammed, exhaust
- P1397: Camshaft position sensor B
- 2A82: Vanos intake solenoid (Part #: 11 36 7 585 425)
- 2A87: Vanos exhaust solenoid (Part #: 11 36 7 585 425)
Models Likely to Have Faults
Listed below are the models of BMW most likely to develop faults within the VANOS system. Therefore, if you are a driver of any of these, be sure to keep up to date on the maintenance of this system.
- 2006-2010 BMW 325i
- 2006-2010 BMW 330i
- 2006-2010 BMW 328i
- 2006-2010 BMW 325xi
- 2006-2010 BMW 330xi
- 2006-2010 BMW 328xi
- 2006-2010 BMW 335i
- 2006-2010 BMW 335xi
Repairing the VANOS System
Repairing the VANOS system is quite a tricky process and can require special diagnostic tools, so it is really a job best seen to by the professionals. Since the VANOS system works in direct relation with your engine, it’s always best to ensure repairs involving the most expensive and valuable part of your car are best fixed by an expert. As the VANOS system is specific to BMWs, it is best to take your car to a BMW or imported/German car specialist to ensure your vehicle is in experienced hands.
As a driver, the best thing you can do to help look after your VANOS system is to schedule regular maintenance and ensure your oil levels are topped up. A low level of oil can trigger VANOS fault codes. So, by undertaking this simple step, you’re greatly reducing your risks of VANOS systems failure.
In regards to replacement, the VANOS system will need its seals replaced every 50,000 miles; where as the unit itself can last up to 70,000 miles. It is important not to delay on replacements and repairs, as a faulty VANOS system will directly impact the performance of your engine.
European Motor Cars
European Motor Cars services those living in or around Summerlin, Spring Valley, and Las Vegas, NV. We are the expert in imported European models. European Motor Cars can fix your VANOS issues with skill and precision to become your trusted BMW maintenance and repair specialist.
* BMW 325i image credit goes to: contrastaddict.