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      11-09-2012, 03:31 AM   #17
Lieutenant Colonel

Drives: E90 335i M sport
Join Date: Jun 2011
Location: Leicester

iTrader: (1)

I'm confused you say you haven't installed the JB4 but also mention you bought a JB4 from a friende but couldn't activate it and got error codes from the engine?

If you have NEVER fitted the JB4 (plugged it into the ECU) than the dealer who sold the car is at fault but if you have tried to fit the JB4 but it went wrong than that may be why the dealer thinks the car is chipped.