Yes, the XC90 REM is monitoring the current consumption of the bulbs - the LED's use much less current, so set of the bulb out error. There's a board level modification you can make on the REM, or you can install "error fix resistors" to draw enough current and turn off the message. The er...

https://forums.swedespeed.com/showthrea ... QR10-plugs

I used the IKH20TT's. Work perfect. Supercede the FK20HQR10 plugs as per:
http://denso.elcome.co.uk/ecat/Search/FK20HQR10

I had to replace my radiator due to a leak on the passenger side top seam. It was on the front side of the radiator (facing the condenser). It was loosing coolant about the same rate.

Hi everyone, I thought I would share how to create your own P2 Auxiliary Headlight Switch (low availability of the original Auxiliary Light Kit / I'd prefer to DIY it). I ordered an interior alarm sensitivity switch and modified the PCB to have it function as an Auxiliary Light Switch (out of stock ...