How Long Does a Speed Control Assembly Last? | YourMechanic Advice

How Long Does a Speed Control Assembly Last?

Using the gas pedal allows you to speed up and control the car on the road, but it can be a chore when driving long distances on relatively flat roads with little to no other traffic. It can lead to fatigue, leg cramps and more. Speed control (also known as cruise control) is a convenience feature built into many of today’s cars that allows you to bypass manually using the gas pedal in these circumstances.

Your car’s speed control system allows you to set a speed and then have the computer maintain it. You can also speed up and slow down without pressing the gas or brake – you just need to use the cruise control selector to tell the computer what you want to do. You can even resume a previous speed if you had to turn off cruise control because of traffic. It also improves fuel economy, as the car’s computer is much more efficient than a human driver.

The key to the system is the speed control assembly. In new cars, it’s a computerized component that operates all aspects of your cruise control system. Like all other electronics, the speed control assembly is subject to wear and tear. One saving grace is that it’s only used when you turn on the cruise control system and set a speed. However, the more frequently you use the system, the more wear and tear it will sustain. In theory, it should last for the life of the vehicle, but that doesn’t always happen.

Older cars don’t use computers. They use a vacuum system and a servo/cable assembly to control cruise functions.

If your car’s speed control assembly is beginning to fail, you’ll notice a few telltale symptoms whether you have a newer computerized system or an older, vacuum operated model. These include:

  • Vehicle drops out of set speed for no reason (note that some cars are designed to drop out of cruise after slowing to a specific speed)

  • Cruise control does not work at all

  • The car won’t resume a previously set speed (note that some cars are designed not to resume a previous speed after slowing to a certain point)

If you’re experiencing any problems with your cruise control system, YourMechanic can help. One of our expert mobile mechanics can come to your location, inspect your vehicle and replace your speed control assembly if needed.


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Jose

16 years of experience
433 reviews
Jose
16 years of experience
Toyota 4Runner - Car is not starting - Portland, Oregon
He arrived during the first real snow storm of the season here and went right to work.
Honda Accord - Radiator - Beaverton, Oregon
Jose was great! He showed up on time to my appointment, and was very informative about what he was working on.

Joshua

26 years of experience
709 reviews
Joshua
26 years of experience
Dodge Avenger - Speed Control Assembly - Oakland, California
My car needed alot of work and Joshua did an excellent job in all that was needed! My car is running great now. Thank you

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21 years of experience
185 reviews
Trevor
21 years of experience
Saab 9-3 - Fog/Driving Light Bulb Replacement (Driver Side) - Carlsbad, California
Great service... on time... able to deal with my exotic SAAB CABRIO! Good communications.

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14 years of experience
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Patrick
14 years of experience
Buick Rendezvous - Check Engine Light is on - Richmond, Virginia
He worked with my schedule and showed up early. He was very professional and fairly quick and accurate in his work. I appreciate him coming out to me. I appreciate the quote to fix these items. It gives me a big relief to know it won't cost me a fortune to get the car 100%. Thank you.

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