BMWs are notably reliable vehicles that provide outstanding performance. To keep them running properly, it is important to stay current on your regular maintenance schedule. Just as with most vehicles on the road a common issue that BMWs suffer from is a vacuum hose leak. During regular maintenance, your mechanic will check the hose to ensure that it is still in good working order.

The Function of the Vacuum Hose

A vacuum hose is often referred to as the vacuum line or vacuum tube. It is a flexible rubber line that channels the manifold vacuum to several accessories and components.

Symptoms of a Vacuum Hose Leak

A vacuum hose leak can produce a lot of different symptoms. Leaks are typically easy to identify with the right tools and expertise. The most common symptoms of a vacuum leak include:

  • Slow Acceleration: When there is a vacuum leak the engine will not get the correct air-to-fuel ratio. This will result in your car running lean which can cause slow or rough acceleration.
  • Rough Idle: A major vacuum leak will affect the throttle body causing your car to idle roughly.
  • Engine Stalling: If the engine isn’t getting the proper air-to-fuel ratio, it can cause your BMW to stall.
  • Backfires: The vacuum leak will affect the way your engine runs. This can lead to backfiring.
  • Poor Fuel Efficiency: If the engine is running too rich, it will use too much gas.
  • Loud Hissing Sound: The leak can make a loud hissing or sucking
  • Car is Hard to Start: The incorrect air to fuel ratio can make it hard to start your BMW.
  • Check Engine Light: When your BMW detects a vacuum leak, it will signal the check engine light. A vacuum leak is not the only issue that will trigger this warning indicator. If your light comes on, have a diagnostic scan right away to determine the cause.

Common Causes of Vacuum Hose Leaks

There are a few reasons why you may experience a vacuum hose leaking in your BMW.

  • Wear and Tear: Everyday wear and tear is the most common reason. Over time, the hose can wear out and leak. To avoid a leak, have the hose replaced as recommended.
  • Heat: Another reason for a vacuum hose leak is due to a failing hose. The hose is made of rubber and can melt when exposed to heat.
  • Road Debris or an Accident: The hose is open to the elements and can be damaged by road debris. It can also be damaged during an accident.
  • Loose Vacuum Hose: A leak could be as simple as a loose hose.

Is it safe to drive with a vacuum hose leak?

We do not recommend that you drive your BMW with a vacuum leak, as it can cause your car to lose power while you are driving. This can lead to a serious accident and injuries to you and others.

Replacing the Vacuum Hose in Your BMW

Vacuum hoses will wear out over time and need to be replaced. Many drivers are tempted to let this problem go unchecked. They wait to see if the symptoms get worse. If you have a vacuum hose leak, do not wait to have it fixed. In doing so, you could be causing damage to your engine. Thankfully, hose replacement is a relatively inexpensive fix.

Your BMW Dealership Alternative

Cerrone’s European is your BMW dealership alternative. Our qualified and skilled BMW mechanics can provide the same service at a reasonable cost. Do not waste your time and money at the dealership.

Dealerships often make you feel as though you must have your BMW services at their facility, but this is not true. By law, the dealership cannot force you to have maintenance performed by them to keep a valid warranty. They do not want you to know this because they charge exorbitant prices on all their work. Instead, bring your car into Cerrone’s European and save money. Keep all your receipts to prove to the dealership that you had the work performed to continue your warranty.

Trust Cerrone’s European with all Your BMW Service Needs

At Cerrone’s European, our technicians can handle all your BMW service needs. Call us today or stop by and see us at Cerrone’s European, 2306 El Camino Real, Redwood City, CA. We look forward to servicing your BMW for all its future needs.