Does anyone know what this is? Trip computer? Mileage computer?



Mileage counter.

EGR - Exhaust Gas Recirculating. It would turn on the dash "check engine light" every 30,000 miles (50,000klms) on California models
advising the owner to relace the catalytic converter. This helped reduce exhaust emissions. It was fitted to carburettor and injected engines.

The 5th letter of the VIN may have the engine code the vehicle had when new.

Michael