Opel Astra J, 55 airbag fault code : This page is about Opel Astra J air bag problem code 55. The possible SRS 55 airbag error reason/s; Internal Electronic Control Module (ECM) fault #55 Airbag Code Repair order ("Recheck SRS at each replacement.") Visually check the wiring harness connection. Replace the harness if it has visible damage. #3 · Nov 5, 2017 I've just agreed to purchase a 63 plate Astra 1.7CDTi 109 and when I was out on the test drive I noticed a code 55 error code on the dash, and the regen light was on. At the time I thought the light meant that the washer fluid was empty! yZAo.