Another questionable 620ti

Pretty common if it has tensioners too that the tensioner connector has come loose (under drivers seat) from moving the seat, or the cable has frayed.

Is there any way to get this fault other than a bad connection?

Not necessarily, took multiple visits to dealer to get my 75 sorted, and my mates citroen has same problem now too!

(Ignoring Meatball's highly relevant comment that the bag might have deployed and not been replaced, which is a different situation again.)

Sure, but it's a bad connection, no? Find and fix it, the light goes out. Easy peasy, so if a car passes through lots of hands with the light on, there must be a problem more significant than that? (Like, now I can bring in the "has been used" suggestion.)

Nope. On Honda's SRS system (Rover 600 is 100% Honda Accord remember) the light will only go out if you pay your local dealer £50 to reset it. Mine came on when my alternator died (as the battery went flat, the SRS system decided it wasn't getting enough power to operate, and so turned the light on). You can actually perform the reset procedure yourself with a paperclip though - see below :

Directly under the steering wheel, just under the bottom of the dash board, above the pedals, you can see a wide grey connector. A few inches towards the drivers door from this, is a horizontal 2-pin yellow connector - with nothing connected to it. Bend your paper-clip into a U shape, and stick the ends into the 2-pin yellow connector, so shorting the pins. Turn on the ignition, and the SRS light will illuminate for a few seconds, and then go out. Now pull out your paperclip (but not right out), so breaking the link. After a couple more seconds, the SRS light will illuminate again. Now stick the paper clip back in, making the link again, and after a couple of seconds, the SRS light will blink twice. Remove the paper-clip, and then switch off the ignition.

You have to do this all fairly quickly - you only get a few seconds between each step. Because you can't see the yellow connector and the SRS light at the same time, it's really a two-person job.

That resets the SRS system - next time you start the car, the lamp will be off - obviously this only applies if you have no fault ! If there is a fault, the light will illuminate again.

In addition to the above, if you've got your SRS or ABS or EngineManagement light on the dash, you can read the fault-code with a paperclip. In the passenger footwell, directly in front of the bottom of the passenger door, is a plastic corner-piece of trim. Prise it off, and you'll see a blue 2-pin connector, again with nothing connected to it. Stick your paperclip into it, so shorting the pins, then turn on the ignition. Count the flashes of the relevent light, and there is your fault code. You'll have to get on Google (remember the Petrol NA cars are Hondas !) to find out what the codes actually mean though.

Useful bit of info :-) I've had mine reset twice, last time it came back on within a few days - presumably it would come back on immediately if it was a permanent fault.. something loose somewhere maybe? After the second time I had it reset the dealer said if it came back on again I'd need a new airbag, but that sounds expensive! There's a sensor on the seatbelts somewhere isn't there?

Bigus