View Single Post
      08-04-2020, 03:51 AM   #104
Gangplank
Brigadier General
Gangplank's Avatar
United_States
1539
Rep
3,071
Posts

Drives: 2011 e82 135i n55 Sport w/ DCT
Join Date: Nov 2015
Location: Vero Beach, FL

iTrader: (2)

Garage List
2011 135i  [0.00]
Quote:
Originally Posted by chesbb View Post
I just purchased a 128i E88. When I run the VIN it tells me that I have a N51 engine. Can someone tell me what is the difference between the N51 & the N52.
N52 is ULEV. The N51 is SULEV., which is a higher emissions standard that is used in CA and a bunch of other states. Lots of info on the web.

http://www.tuningforbmws.com/?q=n51-vs-n52-engine

SULEV is not a bad thing. Same basic power output, better emissions, higher compression and longer emissions warranty on certain parts in some states.

Also if you plan on tuning your car the n51 already has the 3 stage intake as Esteban noted. The 3 stage was used on some higher HP output engines, and with an ECU reflash can add a bit more to the 128.
__________________
2011 135i w/ DCT | ZSP Sport Pkg | PPK | Ohlins R
Appreciate 0