Where to Fix BMW VANOS Issues in Allentown?

BMW models are popular for their reliability and improved engine performance. One of the features that makes this possible is the VANOS system, which helps improve engine power at high speeds and also enhances fuel efficiency. If you are noticing sluggish acceleration, rough idling, or a drop in fuel efficiency, your BMW’s VANOS system may be to blame. However, the VANOS system uses advanced technological innovation, which makes it easily susceptible to failures.

Your BMW’s VANOS system is a complex mechanism that can fail for several reasons. Because this system is central to your model’s ability to function, all BMW owners should be aware of how to identify and prevent Vanos system failure. At Schearer’s Sales and Service, located near you in Allentown, Pennsylvania (PA), we have outlined below everything you need to know about the Vanos System’s purpose, common causes of system failure, and steps to take if your vehicle’s system malfunctions.

What is BMW VANOS?

VANOS stands for Variable Nockenwellen Steuerung, which translates to “Variable Camshaft Timing” in English. It is BMW’s proprietary system designed to adjust the timing of the engine’s camshaft to optimize performance, improve fuel efficiency, and reduce emissions. There are two types of VANOS systems used across BMW models. One is a single VANOS, which is found in earlier models, such as the E36 and some E39s. The other is Double VANOS, which controls both intake and exhaust camshafts and is used in later models such as the E46, E60, and E90. When functioning correctly, the VANOS system ensures the engine runs smoothly across all RPM ranges. However, if the VANOS system malfunctions, it can lead to noticeable performance and drivability issues. Maintaining a properly working VANOS is crucial for the overall health and efficiency of your BMW engine.

4 Common Symptoms of a Failing VANOS System in Your BMW

1. Loss of Power

If your BMW feels sluggish or unresponsive when you press the accelerator, especially at low RPMs, the VANOS system might be the culprit. VANOS controls the variable valve timing, which is crucial for optimal engine performance. When the cam timing fails to adjust correctly, the engine can lose power and responsiveness. This issue is often noticeable during everyday driving or when trying to accelerate quickly.

2. Rough Idle

A shaky or inconsistent idling of your BMW is a common sign of VANOS problems, especially in newer models equipped with Double VANOS systems. The system optimizes valve timing for smooth engine operation, including when the engine is idle. When VANOS is not functioning correctly, the engine can run unevenly or shake when idling. This symptom can be subtle at first but tends to get worse over time.

3. Poor Fuel Economy

If you notice that your fuel costs are rising without a change in driving habits, the VANOS system may be the cause. Faulty VANOS can lead to inefficient combustion by failing to optimize valve timing. As a result, your engine burns more fuel to produce the same amount of power.

4. Check Engine Light

Eventually, a failing VANOS system in your BMW will trigger the check engine light on your dashboard. Modern BMWs will log specific fault codes related to VANOS issues, which can be retrieved with a diagnostic scanner. These codes help pinpoint the exact problem within the system. Ignoring the check engine light can lead to worsening symptoms and potential engine damage. Simply drive into our garage for our expert repairs if you have an illuminated check engine light issue.

Trust Schearer’s Sales and Services in Allentown, PA

If your BMW’s VANOS system is giving you trouble, don’t worry. All you need to do is take it to a trusted and certified auto mechanic, like us at Schearer’s Sales and Service, located near you in Allentown, PA, to run a proper diagnostic on the VANOS system. We will then recommend the appropriate solution. We are the most trusted auto repair shop, having provided service for over 40 years. We also offer a 36-month/36,000-mile nationwide warranty on all services. We also provide complementary loaner vehicles and free shuttle service for your convenience. For any services or repairs, call or visit us today.

* Blue BMW 5-series Car image credit goes to: Vitalij Sova.