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Morning Kenny Just had a quick look at realoem, there is a light set (Outer and Bulb holder) that fall into the date range you have for manufacture that are non exchangeable with the OEM fittings. So looking at the BMW part number on the bulb holder it is (last 6 digits) 177701 (left) 177702 (right) they are the ones marked non-exchangeable. I just checked TIS to see if I could find a reason for them not being exchangeable but cant find any bulletins, strangely BMW make the adapter harness so I assume they were produced for a specific market with lighting restrictions we are not aware of ??? perhaps lower resistance ?? My next door neighbour is pretty high up in BMW I will ask him if there are any internal bulletins that would help? I wonder if lust a change of lamp holder is possible ? Or if your unit should have LED lamps fitted ? The LCM is in the passenger footwell as you say, but I think you can only turn off bulb checks, not sure if you turn them off in the LM or through the IKE (X5 is IKE) OK just got some information which looks a bit of a faff so grab a beer your reading glasses and a comfy seat. This comes from a guy who made the change on his 06 530d The coding first as this will make more sense when I discuss the pin swapping on the retrofit harness. This assumes you are familiar with NCSEXPERT also, again there are plenty of guides on this. In the LM2, you need to change: KALTUEBERWACHUNG_BLK_H_L from aktiv to nicht_aktiv KALTUEBERWACHUNG_BLK_H_R from aktiv to nicht_aktiv WARMUEBERWACHUNG_BLK_H_L from aktiv to nicht_aktiv KALTUEBERWACHUNG_BLK_H_R from aktiv to nicht_aktiv FEHLERMELDUNG_CC_BLK_H_L from aktiv to nicht_aktiv FEHLERMELDUNG_CC_BLK_H_R from aktiv to nicht_aktiv all of the above are in relation to the LED indicators and this tells the LM2 to not carry out cold or warm bulb checks and not report any check control messages in due course. Lastly, you need to change: PWM_ANSTEURUNG_BL from wert_05 to wert_02 and wert_04 This disables the brake light being used as a side light (I will explain this shortly). Essentially it changes the voltage output from 6.598v to 0v PWM_ANSTEUERUNG_RL_33 from wert_05 to wert_04 This increases the tail light voltage from the default 6.598v to 100% (around 13.8v) PWM_AN_NSL_SL from wert_02 and wert_03 to wert_01 This disables the fog light from being used as a side light by reducing the voltage from the default 4.699v to 0v We have to disable the fog light and brake light as side lights as we have increased the voltage on the side light to 100% therefore you wouldn't be able to tell when pressing the brake or putting the rear fogs on as the brightness wouldn't change. The bulb checks on the Pre-LCI as standard for the inner side lights are turned off by default so we don't need to edit the coding on these. The plan is to use the increased side light voltage to power the LED rods to match the OEM LCI lights brightness. The brake light will be utilised in the fog assembly and the fog light will be placed where the brake light was before (the outer light). The inner side light will no longer be powered as that is what we are using. This gives us the Ricky brake effect. In order to achieve this the following pins need to be swapped on the retrofit harness: Left hand side rear light Pin 1 = ground - OK Pin 2 = fog light - move to Pin 6 brake light Pin 3 = Reverse - OK Pin 4 = Side Light - OK (when you get the harness, this linked to Pin 7 on the LCI connector, this need to be moved on the LCI connector side to Pin 4 (LED rods) as we are no longer using the side bulbs Pin 5 = Indicator - OK Pin 6 = brake light - move to Pin 2 Right hand side rear light Exactly the same as above but Pin 4 needs to be moved from Pin 7 on the LCI connector to Pin 2 on the LCI connector side (LED rods) And that's it!! Plug your lights in with 0 errors and give yourself a pat on the back as you have saved yourself £200+ on buying Bruce Miranda cables and you have a working solution with no need for resisters or relays etc. It took me a few attempts to get the coding right but hopefully this will help a few people who are interested in this upgrade. If you have welcome lights coded as well these will light up the LED rods now as well instead of the halogen lights which look a lot smarter. Just seems like a major pain in the backside as most LED lamps sold now have built in resistors I have LED front side lights LED number plate lights and LED third brake light with no warnings on the bulb check just a straight swap (well bit of soldering required with the third brake light) Dave