Ok. Almost 3 weeks later Permatex Ultra Blue has finally solidified. Car throttle pedal reaction feels different and so far RPM glitches did not show up. It looks like sensor replacement in my case is a fix of the problem.

Ok, I've finally replaced the temperature sensor. The problem so far didn't come back. The fan doesn't start when it shouldn't and doesn't stay on when the car is off at least so far. It looks like it's a fix at least as of now. BTW, a rubber ring around the old thermostat has fell apart and turned ...

Thank you so much! You come to the rescue each time I'm in trouble!

I'll check the Volvo parts store URL you've provided for the part numbers!

Thanks again!

Ok, I've finally received the parts. Everything fits perfectly. Air duct bolts are 985743, air duct washers are 986500, and front engine mount "flange screw" bolt is 982819. I've decided to not order plastic nuts for wheel well liners. They are a little bit too expensive for a non-critical...

Hello! Thank you for the support! I appreciate it a lot! Did you ever change the fuel pump relay? My buddy was getting random stalls and loss of power and it threw an ETM light. He has replaced the ETM twice now with junkyard units, but it returned again. This time he swapped the relay and the car h...