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Audi R8 coil packs install They do not fit immediately, require some minor mods to fit tight on the new plugs remove stainless outer sheath, pry apart, pull off. Keep inner SS sheath, cut back rubber grommet to help lower the coil onto the plug. Reason is that the coil doesn't sit low enough over the top of the plug Had a look at some yubtub vids but often they dont show that removal of the outer SS sheath is the key for the coil to sit lower to connect to the plugs. The bimmerlife R8 coil harness is garbage, looking at alternatives for this

Do the hidden OBC unlock and bring up the coolant temp so you can see what its actually reading under different conditions. The gauge being buffered means if it goes even a few degrees out of its normal middle range then its going straight to the red zone. Cooling system refresh is always a good idea as you probably given its probably on old\unknown parts. Never really heard of sensor failing but you can almost guarantee the thermostat and fan clutch are original. When i buy a car i usually remove the radiator at the same time and clean out all usual debris on the front of the fins and the AC condenser area.

Update… I’ve spent the entire day checking all fuses/wirings in the morning yesterday, seems all working fine, the fact that when I replaced the abs sensor at rear right around last year, and I rechecked the connection/wiring around it, as well as reluctor ring at the hub and it’s not broken, gave it a good clean, still didn’t change anything. so I decided to replace the abs pump as I had a second hand one that’s already repaired before, sucked the brake fluid out from the reservoir, removed and replaced the abs pump, filled with new fluid, scanned and recoded using INPA/NCS Expert, carried out the brake flush through pressure bleeder. At this stage brake pedal feels firm as it should be. When I turn the car to ignition, the lights were changed to amber yellow, hand brake light was on but when I started the car it turned off as soon as I released the hand brake, got out to the road and both abs light/traction control light went off and so far never came back on. Most likely I will bleed the brakes one more time in case, but otherwise brakes fine, abs works, I think I can say I’ve sorted out the issue. The things I’ve learnt from this was never take in of what the scanner says, sometimes it would pinpoint out the problem doesn’t mean it’s the main cause of issues. I’ll drive for next couple of weeks and if the lights doesn’t come back on I’m happy with it......