As above, getting it done at a garage should take less than 2 hours. Doing it yourself for the first time will probably take a bit longer. My old mans got a 4 poster and I changed the lot on mine in 2 1/2 hours, and that was a first time for me on the BMW. It's a really easy job to DIY on these as opposed to some other marques I've worked on.
E92 335i | 6 Speed manual | BMS 4xLED Halo Bulbs | JB4 (waiting to be installed) | BMW Performance Gloss Black Grills | BMW Performance Exhaust | Smoked side Repeaters
Aero Front Lip | M3 Lip Spoiler |19" Cades Tyrus 'Gunmetal' with polished lips | Falken FK452 Rubber
........... More to come