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Hi I recently bought a 2010 Renault Megane 1.5dCi.. The only problem I have is the seat belt alarm was going off even when seat belts were fastened....I bought seat belt alarm stoppers off ebay which you connect into the seat belt holder... I put them in. 1 in drivers seat 1 in passengers seat.. and drove the car and great.. no annoying alarm..then when I had a passenger the alarm goes off again...so the drivers seat is fixed but the passengers is not.. I took the seat belt holder apart and seperated 2 wires which were touching which I assumed was the alarm wires...that didnt work...looked under the seat saw that a wire had been cut by the previous owner. so I rejoined them..Still didnt work..took all the sensors out from under the seat ..still didnt work..disconnected 2 plastic connections under the seat and it worked ..no alarm.. But a warning sign comes up on the dash.. air bag not working.. the alarm is so annoying I am tempted to drive it with the air bag not working..If anyone has any suggestions how to stop the alarm I would be very grateful thanx:frown2:
 

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Hi

fix it, don't just run without the air bag system working.

They are there as a safety feature and should you have an accident and they are found to have been deliberately disabled then your insurance company will not be very happy. You may even get charged with running a knowingly defective car ?

Additionally your passenger - think of them - they are traveling in the car expecting it to be safe in the knowledge that they are traveling in a car with a 5 star safety rating. Could you do that to them, could be your partner, mother. ?

You have tried to guess what is wrong and failed unless someone here can give you the information to fix it, take it to an expert.

Al
 

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for anyone with similar problem .......... From your description it sounds like the seat occupancy sensor has failed. It tells the SRS system when someone is setting in the seat and approximately how heavy they are to regulate the firing of the multi stage air bags. When the seat is empty it also tells the SRS that as well. The belt alarm is the result of that fault nothing to do with the belts themselves. Easiest solution would be to replace the sensor as it isn't something that can just be jumpered out as it sends different signals depending on the state it is in.
Replacement involves removing the seat, then accessing the sensor and replacing it. However it is usually a lot easier to just get a replacement used seat and bolting that in and connecting it. That would restore the system.
You could also have a shop scan the SRS system to verify that the sensor is bad. You might want to look under the drivers seat as there is a similar system there and if the PO liked cutting wires you could get a bad surprise if you were to hit anything as the airbags might not deploy at all.
 
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