Skip the auto shop - Our mechanics make house calls

Q: Seat belt sensors malfunction when car sits in heat

asked by on

When temperatures are above 87 degrees F and my car has been in the sun in an open parking lot while I’m at work, the seat belt sensor malfunctions. I had my seat belt firmly clasped but the seatbelt warning started beeping for 5-10 minutes until the interior temp dropped below 87 degrees (as seen on the dashboard). The seatbelt warning did go off after I turned on the air conditioning and/or opened the window. This problem is ongoing and it has occurred several times in the past also. The seat belt malfunction can be reproduced if my car is in the direct summer sun for a few hours. I’ve learned that airbag sensors can interact with faulty seat belt sensors, so I feel this is a serious safety concern. Can you please tell me what needs to be done to fix this?

A: Hello. This is caused by the female part of...

Hello. This is caused by the female part of the seat belt failing. The sensor in the receiver fails internally and will usually be susceptible to changes in temperature when it fails. It will need to be tested and replaced with a new unit from the dealer. If you are going to have this repaired, consider YourMechanic, as a certified mechanic can come to your home or office to inspect the related electrical components and let you know what needs repair.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: How do I use the rear side seat belt hooks?

The rear side seat belts can be stored along the door to keep them out of the way when you fold down the rear seats. To do this, simply hook the rear outer seat belts to the hooks below the...

Q: Engine oil warning appears when turn off car

Hello. Thanks for writing in about your 2007 BMW 320i. I would have the battery and the connections at the battery checked. If there is any corrosion or a bad connection, then this will occur. If not, then it may...

Q: Why is my oil filter crushing/squeezing after few minutes of driving?

I would suggest checking the oil passages and oil pump. This can happen when oil passages get clogged and the oil pump has to work harder to pump oil. The pressure from the overworking of the oil pump can cause...

Related articles

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 Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...