The location of the OBD (On-Board Diagnostics) port on an Opel Frontera depends on the vehicle's generation.
If your model has a large central ash tray, slide the tray completely out of its housing. opel frontera obd location
The port is typically exposed and colored bright pink, purple, or black. The location of the OBD (On-Board Diagnostics) port
This depends heavily on your engine and year . sometimes a round BMW-style diagnostic plug
Because Opel used both GM and Isuzu electronics, early Fronteras have weird diagnostic setups—sometimes a standard 12-pin connector, sometimes a round BMW-style diagnostic plug, and occasionally a two-pin blinking LED system.