Dear Swedish Baklava,

Hope you're well. If the SRS light comes on, codes can be read via the OBD-1 boxes mounted on the driver's side strut tower (Port B-5). Other than that, there are no user diagnostics. Use of an ohmmeter to test for continuity - i.e., for an internal circuit fault - might, if there is no fault, trigger a deployment.

In recent years there have been a few posts reporting deployments in collisons. From those we can infer that 20-year-old components still work.

Volvo never put into 940s any components from Takata, the Japanese airbag maker that uses ammonium nitrate, a lower cost but unstable source of the gas that inflates the bag.

Hope this helps.

Yours faithfully,

Spook