[PAT3L]

I have a 2013 BMW X3 twin-turbo, I've bought it second hand only with 40,000km on the vehicle. After a couple of weeks of purchase I noticed that the oil temperature gauge wouldn't go up at all, sometimes it did but majority of the time it did not.. I also noticed that the car had a lot of hesitation when accelerating, the RPM wouldn't go over 2500 and wouldn't let me exceed anything beyond 100km/hour while other times theres no hesitation whatsoever. Just recently since it started to snow I noticed that the heat wasn't as warm as it should be and that too was lacking... Has anyone faced this issue and was able to fix it? Its out of warranty sadly..

Appreciate the help in advance!