Speaking of Jeep from experience.
Blend actuator doors that get stuck on the drivers side due to the rubber coating in the body warping. Only way to fix is to remove the whole heater core and dash. I tried to find a place big enough to drill to bypass the door, with no luck.
And a clock motor to drive the passenger and drivers side hvac doors with a little plastic gear, that breaks every few years.
Yes the main battery is under the passenger seat, so in order to remove I had to hook a battery to the underhood jump points to move the seat forward, back, forward, back in order to replace the battery!
One of the headlight power supplies went bad, in order to replace the whole front bumper and grill need to come off to get the headlight out, as the driver is under the headlight assembly.
Plastic oil pan, but has a skid plate. However, over time the plastic warps and weeps oil. I mean an off road capable vehicle with a plastic oil pan
Computers under the drivers seat and passenger seat, wonder what happens when you spill something......
New cars, no dipsticks at all, everything through the front dash console.