E90/E91/E92/E93
Key reference: 66126986585
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Diagnostic port location (OBD)
Illustrative — for orientation only.
LHD: lower left of the driver's footwell at the base of the left A-pillar, just above the bonnet-release handle and above pedal height, behind a small grey/black flap marked 'OBD'. RHD (UK): same arrangement mirrored to the driver's side - at the base of the right-hand A-pillar beside the bonnet-release handle, in the trim panel next to the kick panel under the steering column. Same position on saloon (E90), Touring (E91), Coupe (E92) and Convertible (E93), pre- and post-LCI, all engines. Many UK cars have had the socket unplugged and tucked up behind the dash (or moved to the glovebox or armrest) as an anti-theft measure - if the flap is empty, feel up behind the trim above the pedals before pulling panels.
Outer cover: a small flap labelled 'OBD' in the A-pillar footwell trim - pull it towards you, no tools. Behind it the 16-pin socket carries a second OBD-labelled cap (with a small resistor in it) that pulls down but stays tethered; pull it off the socket before plugging in. If the socket is missing, the full trim comes off with three Torx screws on the kick panel under the column plus the screw through the bonnet-release handle.
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