Is this actually the coding plug or just the slot for it?? Also, the unit is from a 325. If this is the code plug, is it worth shelling out for a 2.0 version or will the readings be near enough accurate?
That is the coding plug there mate.
The 2.0 and 2.5's have very similar economy, and it's not 100% accurate anyway, I wouldn't change it. Ԛ£40 at the dealer