Skip the auto shop - Our mechanics make house calls

How Long Does a Cruise Control Vacuum Reservoir Last?

Cruise Control Vacuum Reservoir

The cruise control vacuum reservoir is an air bladder that stores a supply of spare air that is vacuum pressured for when the primary vacuum runs low. This part is located directly behind the front bumper of your car. To understand how this part works, you should understand a little bit about how the engine and cruise control works. The engine in your vehicle creates a vacuum pressure when the pistons are in the down stroke. The air is then drawn into the cylinders and then saved to operate features such as the cruise control.

The servo needs a constant supply of vacuum to maintain its position. If there is more demand for vacuum than the engine can provide, the operations that are run by the vacuum will not work like they should. For example, the cruise control speed will go to excessive speeds or the servo will not stay in the correct position.

The cruise control vacuum reservoir has negative pressure inside of it. Once the RPMs increase on the engine, and the engine vacuum lowers, the reservoir has a good amount of vacuum to ensure the engine has a steady amount to keep the various functions operating as they should.

Over time, the cruise control vacuum reservoir can become broken or fail. If the reservoir leaks or fails, the vacuum pressure will not be able to remain as it should and the other operations will not function properly. The reservoir does not normally get inspected during maintenance, so if you suspect the cruise control vacuum reservoir is going bad, it is important to have a professional mechanic diagnose the problem so they can replace the part.

Since the cruise control vacuum reservoir can fail over time, you should be aware of the symptoms that indicate the part needs to be replaced.

Signs that show your cruise control vacuum reservoir needs to be replaced include:

  • Cruise light on your dashboard
  • Cruise control will not set at all
  • The cruise control surges on its own to mph above where you set it
  • Other features in your vehicle do not work such as the air conditioning, power brakes, or heater

If you are experiencing any of the above symptoms, book a service with a mechanic to replace your cruise control vacuum reservoir.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
Icon-warranty_badge-02

Skip the repair shop, our top-rated mechanics come to you.

At your home or office

Choose from 600+ repair, maintenance & diagnostic services. Our top-rated mechanics bring all parts & tools to your location.

Fair & transparent pricing

See labor & parts costs upfront, so you can book with confidence.

12-month, 12,000-mile warranty

Our services are backed by a 12-month, 12,000-mile warranty for your peace of mind.

Get A Quote

Need Help With Your Car?

Our certified mobile mechanics make house calls in over 2,000 U.S. cities. Fast, free online quotes for your car repair.

GET A QUOTE

More related articles

How to Find the Keyless Code on a Ford Explorer or Mercury Mountaineer
Many Ford Explorers and Mercury Mountaineers were manufactured with an option known as the Ford keyless entry keypad. Some models refer to it as SecuriCode as well. It...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
How to Get a Louisiana Driver's Permit
s licensing program. The first step in this program is to obtain...


Related questions

Q: Rough Starts & Idle

The fuel pump code for the secondary fuel circuit fault may be the fuel pump module on the cross member under the truck. The module can go bad and cause no fuel pump operation intermittently. The engine vacuum line from...

Q: Truck not starting

Without knowing the exact model of the vehicle it will be difficult to make an accurate diagnosis. If the dashboard lights and all electronics go dead when the key is turned to start the vehicle, then the battery and connections...

Q: Stalling issue and hissing sounds.

Hi There, It sounds like you definitely have a vacuum leak. High idle speed, stalling and hissing sounds are common signs of a vacuum leak. When a vacuum leak is present in an engine, this causes an excessive imbalance in...