B9 / B9.5 (8W, MLB evo) - US-market sedan, allroad and S4
Key reference: 4M0959754AK
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ConfirmedOBD port
Illustration — use it to know where to look.
LHD (US): driver's footwell, under the lower edge of the dash to the left of the pedals and steering column, beside the driver's left knee and level with the footwell light. The 16-pin socket is usually purple, faces down and is clipped into the lower dash trim, so crouch into the footwell and look up. Same position on the A4 sedan, allroad and S4, pre- and post-facelift. If a tracker or OBD lock has been fitted the factory socket may have been unclipped and moved.
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