K&NMotorluftfilter 33-2942: Hochleistungsluftfilter, Abwaschbar, Ersatzfilter, Erhöhte Leistung, 2003-2024 (BMW X1 16d, X1 18d, 20d, 25d, 316D, 318d, 320D, 325d, 330D, 335d, X1 23d, 116d, 118d, 120d)

Have used K&Nany,any times. Not for any sport advantage etc, just for coat effectiveness and this one for my old BMW e84 does that job in spades. Perfect fit, easy to install and on this mornings commute the old girl does feel a little more spritley. For the discount price I paid here on Amazon it'll pay for itself in only 2 more oil changes, so what not to like.

Excellent product ,been using K&N since I started driving ,much better throttle response and no need to change every year,and also sounds much better,BMW e90 320d.

Fits perfectly and noticeable performance increase from the old standard filter which was needing changed

This filter is good it does what it’s supposed to do & improves performance a little bit because of better airflow

Bought this for my 2009 BMW E90 330d and fits absolutely spot on five minutes job to swap ,sounds a little different on induction noise but not a lot ,other than that happy with the product 😃

Good price, quick turnaround with delivery and works as advertised. Definite improvement in fuel efficiency, my 318d went from 61.4mpg avg to 62.7/64.7mpg avg (I do a lot of motorway driving). Hard to quantify if bhp has increased, hasn't impacted on performance anyway. Overall happy, especially if it will do for the lifetime of the car, so worth the investment.

Fits in so easy and works great 👍My car Seems to have more power and more responsive

Bought this simply because I wanted a little more induction noise from the engine, but didn't want to go with the cone filter, which basically would just suck up hot air from the engine unless I extended the pipe and put it lower down more towards the front of the car.It doesn't have the same sound as when I used a K&N Cone Filter on an older car of mine but then again that was a Petrol, on this BMW 320D it has just made the turbo whoosh noise a little louder and there is a bit more induction noise than, standard at the higher revs, the car already had quite abit of induction noise anyway but not at higher revs.It might sound better though once it's been remapped which I intend to have done within the next 2 months.Not as good as I was hoping but, it's still better than having to pay for paper filters over and over again especially as the one I took out of the car was only put in when I got, the car 7 months ago and when I took it out it was filthy.