Discussion
No such car, there's a the 435i is just a regular 4 series, not a M or M lite car.
The N55 is a solid motor though, as is the ZF8 (assuming it's and auto). Not hear of any major issues with them, although the 3er is more my thing they're very similar cars. I'm sure someone will be along with better info soon.
The N55 is a solid motor though, as is the ZF8 (assuming it's and auto). Not hear of any major issues with them, although the 3er is more my thing they're very similar cars. I'm sure someone will be along with better info soon.
Just drop the first M in your title 
N55 introduced in prior generation (E92 335i) and generally seen as more reliable than predecessor N54 on issues such as turbos and fuel pumps tho I had a N54 and it was fine
You / your friend could google N55 issues , but I don’t recall reading any major reliability concerns with the engine. Just check service / maintenance history on the cars you consider.
Depending on price / age of target cars , watch out that there are no similarly priced 440i models as the B58 they use I think is widely accepted to be better all round (to my ears they definitely sound better) unless your friend hopes to tune the car as I’m not sure if the B58 is as tuneable as the N55, yet?
N55 introduced in prior generation (E92 335i) and generally seen as more reliable than predecessor N54 on issues such as turbos and fuel pumps tho I had a N54 and it was fine
You / your friend could google N55 issues , but I don’t recall reading any major reliability concerns with the engine. Just check service / maintenance history on the cars you consider.
Depending on price / age of target cars , watch out that there are no similarly priced 440i models as the B58 they use I think is widely accepted to be better all round (to my ears they definitely sound better) unless your friend hopes to tune the car as I’m not sure if the B58 is as tuneable as the N55, yet?
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