Near side and off side are terms only used in the UK as far as I know, so meaningless to most people. Drivers side and passengers side depend on whether it's LHD or RHD, so also confusing.
Does your RHD car suddenly have the steering wheel on the left, just because you're looking at the car from the front? I think it's pretty much universal that for things that move like cars, trucks, boats, aircraft, etc left and right (or port and starboard) are always referred to in relation to it's 'normal' direction of travel.
The only other way to describe the position of the sele reservoir for example, would be to say that when standing in front of the car looking at the engine bay the reservoir is to your right. It can be to your right, but it will always be on the left side of the car.