I just finished an engine swap on my 2008 Mini Cooper S (r56/ n14 engine). First time driving the car, it goes dead when accelerating and I am getting a PO108 (MAP Sensor) code. I cannot find the location of that sensor anywhere in my repair manual or on the internet. Anyone have any pics or can point me in the direction of where that sensor is located?

 

There is one on the Air intake manifold. there is also another one on the charge pipe going to the throttle body.

 

MAP = manifold (back side near the firewall)
MAF = intake

 

Sounds like you're ready to learn about your Mini. Here's a link to an illustrated parts diagram --- https://www.realoem.com/bmw/enUS/select --- either enter the last seven digits of your VIN, or select your year make model etc from the lists. And if you're gonna do your own work, here's a set of service instructions --- https://www.newtis.info/tisv2/a/en/

Have fun ---