Airbag Sensors

Airbag Sensor Symptoms & Replacement Cost

In Airbag by 12 Comments

Airbags are one of your car’s most important safety features, and one should always ensure that they are in fully working condition.

However, many drivers have complained that the airbag light in their car starts to blink without any reason, and it is often ignored.

This leaves the driver at serious risk if the car experiences a collision and the airbags do not engage.

If you do any work on your airbag system, always follow the repair manual closely or take help from a professional. Faulty airbag installations can cause death in case of an accident! Never work on airbag systems without breaking the power in your car. Never measure any airbags with multimeters or other devices, as they might blow off because of this.

In this article, we will discuss some of the common symptoms you might face when the airbag sensor becomes faulty and starts to malfunction.

Bad Airbag Sensor Symptoms

Airbag Light On

There are actually two different symptoms you can expect when you have a broken airbag sensor.

The most common symptom of a bad airbag sensor is the Airbag light will get displayed on your dashboard.

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The other symptom is something you really do not want to happen, and this is that your airbag will not deploy in case of an accident. I really hope you w

What Is an Airbag Sensor?

Airbag Sensors

The sensor is basically a detecting device that can read rapid deacceleration of the vehicle and generates a signal as a response.

Its basic function is to electronically communicate the information with the electronic control unit and all the equipment related to the airbag system.

The intensity of the collision is also noted and it is used to determine whether or not the airbag should inflate.

Where Is the Airbag Crash Sensor Located?

Side Airbag Impact Sensor Location

Usually, you have two airbag sensors located in the front of your vehicle behind the bumper. There is often also one airbag sensor installed inside of each door of your car.

A car usually has several different airbag sensors installed, so to determine the exact location of the airbag sensors, you have to specify which one you want to find.

The best way to go about finding the airbag sensor’s location in your vehicle is to refer to the service manual provided by your manufacturer.

Airbag Crash Sensor Replacement cost

An airbag sensor costs 50$ to 300$ and a labor cost of 50$ to 300$. You can expect a total airbag replacement cost of 100$ to 600$, including everything.

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The airbag sensor is a sensitive component, and so is the replacement. This can take as long as 2 hours, even for a professional, to properly diagnose and install the airbag sensor.

The airbag sensor itself is often not super expensive, and you can expect to get a new one for 50$ to 300$. You should always buy an OEM original genuine and never buy aftermarket sensors – do not take the risk!

If you feel very comfortable repairing cars and closely following the repair manual, you can save money and replace the airbag sensor yourself.

If you feel the slightest doubt about the replacement, let a professional do it instead.

Remember that it is an essential part and you want to install it correctly in case of an accident. There is also a risk that you will deploy all airbags in the car if you do something wrong – which will cost several thousands of dollars to restore.

How to test an airbag impact sensor

Car Diagnostics

Testing of an airbag sensor is possible, but should not be done.

The only way you safely should test an airbag sensor is to use an automotive diagnostic tool to read the airbag control unit’s trouble codes and live data.

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Check for any measuring values inside your diagnostic tool and if there is a trouble code on the sensor, measure the wirings between the airbag and the airbag sensor.

If the airbag sensor’s wirings and connector are fine and the airbag control module says there is a problem with the airbag sensor, replace it!

They often not super expensive, and you do not want to mess around with these parts because you really want it to work if the accident occurs!

12 thoughts on “ Airbag Sensor Symptoms & Replacement Cost ”

Comments
  1. Where can I find the signalling description between the ECU and airbag sensor bosch 0285003001?

    Thanks

    1. Hello, I recently hit some fiberglass cones on the freeway in my 2011 Lexus ES350. It damaged the lower portion of the bumper and one of the cones jerked the two wires out of the side impact sensor connector. The sensor does not appear to damaged in any way but the airbag light came on. I was able to remove the sensor and I repaired the wires with a short pigtail coming out of the connector. I want to solder the pigtail back to the two wires coming out of the harness and put shrink rap tubing over the repaired splice. I tested the sensor and found it has approximately 940 Megohms of resistance and I used the diode check function and it shows voltage flows in only one direction. Would it be safe to reconnect and do the readings I got on my Multimeter appear correct for the sensor?

  2. I have a 2011 lexus gx460 premium, and the airbag light is on solid, ran a scan with autoboss v30 and got DTC B1831. I have checked both front seat airbag connections and confirmed to be secured. Tried clearing the code but it keeps coming back immediately. Please what else should I check, can the front impact sensors be bad and give the same code

  3. Magnus what should the front crash sensor read in ohms on a 9.3 saab 2006 convertible. The part is 12762215. Should it be open circuit if it is Ok? or should there be a reading of low ohms? Thanks Peter

  4. How do i replace a rocker cover gasket on a Peugeot 807 as this is way in under the back of the dash .if you get my meaning

  5. Hello, I recently hit some fiberglass cones on the freeway in my 2011 Lexus ES350. It damaged the lower portion of the bumper and one of the cones jerked the two wires out of the side impact sensor connector. The sensor does not appear to damaged in any way but the airbag light came on. I was able to remove the sensor and I repaired the wires with a short pigtail coming out of the connector. I want to solder the pigtail back to the two wires coming out of the harness and put shrink rap tubing over the repaired splice. I tested the sensor and found it has approximately 940 Megohms of resistance and I used the diode check function and it shows voltage flows in only one direction. Would it be safe to reconnect and do the readings I got on my Multimeter appear correct for an impact sensor?

  6. I recently bought a pre-owned 2015 Range Rover evoque pure plus. I’ve only had it a month and a half and the passenger airbag light stays on, the seatbelt light started flashing on while I was driving (the seatbelt was buckled) and one of my headlights went out. I’m frustrated as hell as I just purchased the vechicle with no warranty. (stupid me) What could be the cause?

  7. My light use to flash and it would always go off but now its staying on all the time.What could that be??

  8. Hello i just got my GMC terrain SLT out of shop to have passenger side front and rear doors replaced. Im now getting a “service air bag” message and the air bag light constant. The codes im getting are B0085 (left front side Impact sensor) & B0088 (right rear Impact sensor). The service message wasnt on before taking it to the body shop. Can you help with this?? Thanks Stu…

    1. My ABS, Airbag lights are flashing in My 2006 GMC Sierra what do I need to do.

  9. My wife has had her 2001 Infinity since new. It has 83K miles on it. I few weeks ago the airbag light started flashing. The dealer said it was the front “crash load sensor” (part # 98581-3Y125) that needed to be replaced. Unfortunately there are none available in the U.S. from Infinity or Nissan or the supplier. The Nissan customer service lady was very nice but said they are no longer available. Do you know if there is anyone who can either repair this one or recommend a substitute part that will work?

  10. Love your in depth help about airbags
    I have an 2015 ALTIMA SL bought new in November 2015. Has 98,500 miles. Have had red light on dash on since a year ago. Been in touch with dealer and Nissan during this time. Trying to get fixed. But they now say defective module and $1325.00 to fix. Original thought it was seat belt. Now they say drivers side airbag. I see some processes on your site about turn key off but have push button starter. Love the car. No real issues for 5 yrs. this is first time ever had any airbag issue with any many cars over last 50 years. Tried 3 times to get Nissan in Tennessee. But they say not covered under my extended paid for warranty. This is 3rd Nissan Altima financed with company. You would think they would take care of their very senior customers. Wife is 76 snd I am 81. Here in Dallas dealing with Clay Cooley Nissan in Desota Texas. Very large dealer with multiple locations over the multi PLEX. Any ideas???

  11. If you need answers to your car questions, it is much more likely that you will get answers in our car community. You can find our community here.

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