Yeah .. or it might have water ingress corroding the terminals. As long as the connector is dry and clean I'd get a new 7N series 19 in that car and configure it. Firstly use the Long coding helper to code the drive side and chassis and then use the
[Installation List] to tick all of these boxes:
01-Engine -- Status: Malfunction 0010
02-Auto Trans -- Status: Malfunction 0010
03- Brakes -- Status: Not registered 0011
04-Steering Angle -- Status: OK 0000
08-Auto HVAC -- Status: Malfunction 0010
09-Cent. Elect. -- Status: OK 0000
15-Airbags -- Status: Malfunction 0010
16-Steering wheel -- Status: OK 0000
17-Instruments -- Status: OK 0000
19-CAN Gateway -- Status: Malfunction 0010
25-Immobilizer -- Status: OK 0000
42-Door Elect, Driver -- Status: OK 0000
44-Steering Assist -- Status: Malfunction 0010
46-Central Conv. -- Status: OK 0000
52-Door Elect, Pass. -- Status: Malfunction 0010
55-Headlight Range -- Status: Malfunction 0010
56-Radio -- Status: OK 0000
62-Door, Rear Left -- Status: Malfunction 0010
72-Door, Rear Right -- Status: OK 0000