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?

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 buckle a seat belt?

Before driving your vehicle, you should always buckle the seat belt. To do so, pull the latch out of the belt retractor, and slowly pull the belt across your body. Insert the latch into the buckle, until you hear a...

Q: The rear window automatically comes down after closing it using the second stage on the switch.

Try this procedure for resetting the windows: with all the car windows fully closed, enter the car and put the key in the switch. Turn the key to the on position, but do not start the car. Lower the driver's...

Q: The Malfunction Illumination Light is on my Dashboard , not sure why?

Hello, thank you for writing in. A warning light of any kind means the computer has detected an issue. When this happens the vehicle's computer sets a diagnostic troubleshooting code which can be read with a scan tool. It is...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
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...