My Peugeot 308 SW seatbelt warning alarm keeps going off even whe…

17 Nov 2014 | Author: | Comments Off on My Peugeot 308 SW seatbelt warning alarm keeps going off even whe…
Peugeot 308 SW

A Peugeot 308 SW question from Paul

My Peugeot 308 SW`s seatbelt warning alarm keeps going off even when noone is sitting in the seats. This only happens with the three seats in the back of the car. If I have every seat occupied and everyone fastened in it also does it then.

Any ideas why?


Did you find any resolution to this problem? Have exactly the same problem myself and garage can’t come up with a diagnosis or solution. It’s driving us crazy. Lesley G from Ayrshire

I also have this problem on my 308SW. First happened about 3 months ago – hardly ever use the rear seats – and no one sitting in the rear at the time. First one sensor went off – to stop I fastened seat belt and it was fine then after a couple of days the next sensor started giving problems ended up fastening all the seat belts.

Then after week or so they started to go off again even with the belts fastened. After removing the seats and putting them back in to see if this cleared the problem booked the car in for a diagnostics check but before putting in I had to unfasten all the belts and amazingly all was fine so cancelled the diagnostics. OK for over a month then started up again. Currently I have two belts fastened and one not and have again got the car booked in. Extemely annoying fault.

Did you get a solution. What’s the problem and how do I fix it? (1.7cdti) – Graham Tennant from Renfrewshire

Rear seat belt problem drove me mad as there seemed to be no rhyme nor reason for the alarm to keep going off. After a month of it with no ideas from various garages I took out the middle row of seats pulled up the carpet and disconnected the sensors from the wiring loom. Trouble is I can hear the wife nagging again now. Jason from Lincolnshire

Mine started doing this today (20/2/13). If you take the seats out, detach the plastic trim from in front of, and behind the seats, and lift out the carpet panel, you will see a black plastic strip with a connector at the near side end. Disconnect the plug to disable the system.

It’s less frustrating to disable the system and check any passenger’s have done up their seat belts then to try and sort out a random problem that I doubt will show up in a diagnostic check and will probably be expensive to repair. I suspect the fault is where the plug connects to the flexible PCM in the plastic ’strip’ rather than the wiring. Laurence from Dorset

My Peugeot garage had the car when the alarm was being issued, but said they couldn’t find the fault! All three seats started alarming yesterday (05/03/13) even though the seat belts were connected. Garage can’t book my car in till next week – and when I asked them to disable the alarm in the meantime, they said they couldn’t.

Something to do with Europe regulations. Anyway, thanks to this helpful post I have now successfully disabled the alarm. Note – you only have to take off the front plastic strip – and to do so you just need a small screwdriver to release the clips over the metal bar.

If Peugeot find the real reason for the problem, I will post here too. THANK YOU! Tony from Sussex

I have had the intermittent seat belt fault with 2 of the three rear seats in my 308 SW. After two visits to the Peugeot garage (first time said they couldn’t find anything wrong) they now say it needs a seat belt pickup, apparently a bar with sensors and transmitters, fitted. The quoted price £128.

Asked if they could disconnect and they said no as may cause other faults. After reading this I will be disconnecting it myself. There is no guarantee that after being replaced the same fault won’t develop! Rather not waste my money – CLC from England

Peugeot 308 SW

I wish I had read this forum before I booked my car in – it is now in the garage for the 4th time. I have paid to have one seat belt stalk replaced (and labour!). Then it was reccomended that I replaced the ariel base unit (after the garage spoke with Peugeot in France).

I also did this. I’m over £300 out of pocket and it hasn’t resolved the problem. The seat belts alarmed the day after I got the ariel base unit fited and now the seats don’t alarm when my passengers don’t put their seat belts on. So frustrating. – Diane Hedlund from Mid-Lothian (Edinburghshire)

My wife has this problem with her Peugeot 308 SW, the rear seat belt alarms keep going off. I have read the above posts but cannot find the correct plastic trim to remove? Could some one please a little clearer and explain how to locate and remove this trim to get at the connector? Mark Smith from Berkshire

Thank you so much for your answers, this problem has been driving me mad. On my 308 under the nearside rear seat, lift the carpet, remove plastic cover and slide the connection apart. No alarms, but peace at last. Well done all. – Norm from Sussex

Had the same problem. Warning light stayed on along with the very loud alarm beeping even if nobody was sat in the seat. Tried taking the seats out as some have suggested and it made no difference. Took the car to my local garage. Using WD 40 with the plastic arm attached to the canister, the mechanic sprayed a liberal amount into the offending seat belt connector.

He then clicked the seat belt in out a number of times and then the warning light went off. So far no alarm either. He then did the same for each seat belt just to be sure. He thinks the fault is caused by poor seat belt connector contacts.

I’m assuming it’s my kids dropping god knows what food/liquid into the seat belt connectors. If any of you have kids/messy people, it might be worth a go. Hope this helps – Chris from Caerphilly

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