Well, considering how the rest of the car should not exist... your turbos don't seem to exist either! /ubbthreads/images/graemlins/grin.gif
MD181852 is the downpipe for the 'right' or front turbo. There is a number cast into the exhaust outlet on the first photo, which appears to be 181851, or MD181851 if it were a part number. But this doesn't seem to exist either.
The 49193-29501 is an identification number for the complete turbo unit. It should be a Mitsubishi turbo based on the 4xxxx number but the massive list of turbos I have access too doesn't even go to 49193!
49124- TC15
49127- TD15
49129- TF15
49130- TD02
49131- TD03
49132- TD09
49134- TF08
49135- TF035
49160- 4MD
49161- 4HD
49162- 4LE
49163- 4LF
49166- 3LM
49167- 5MF
49168- TC05
49169- TC06
49170- TC03
49171- TC04
49173- TD025
49174- TD08
49175- TD07
49177- TD04
49178- TD05H
49179- TD06
49181- TD10
49182- TD13
49183- TE04H
49184- TE05
49185- TE06H
49186- TF07
49187- TD07S
49188- TD08H
49189- TD04H
After a bit more searching I stand corrected. I've found a mention of 49193 on a Suzuki Alto website. 49193-25302 is listed between the TF035 (49135-03110) and the TF035H (49495-60701). It kind of looks like your turbo...
Can only guess the light sensor is for automatic headlight activation?
This car is full of mysteries!