I have had a K&N in a TDI for over 300,000km. NO MAF problems.
Pros: no MAF problems
Mileage: 300000 km
Reviews of K&N parts For Business
Average Rating
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The manufacturer's average rating is calculated based on ratings of all its spare parts. It determines the place in the manufacturer ranking
3.9
Manufacturer Ranking
#90
429
Spare Parts
6
Country
USA
Website
knluftfilter.com
Spare Parts
Comparisons
As been the pattern with the 2.5 engine, if, you install and intake and get a CEL recheck all connections making sure the 2 smaller hoses are tightly fastened and without kinks. Make sure that the MAF is properly seated in its housing.
Pros: tightly fastened hoses
Cons: CEL after install
I personally haven't had any trouble with my K&N's
Pros: no trouble
on my turbo it revs a little faster.
Pros: revs a little faster
I dropped one in and got better gas mileage, noticable power increase (slight), and a badass sound.
Pros: better gas mileage, slight power increase, badass sound
I've used it in a few of my cars, and have noticed a very slight (~1-2mpg) increase in mileage. Power, eh, if there's any I can't feel it...
Pros: slight mileage increase
Cons: no noticeable power gain
I had installed a K&N air filter and noticed a good increase in power and fuel economy.
Pros: good power increase, better fuel economy
Vehicle:
Volkswagen Jetta
I had my k&n installed on my passat at 19k miles, i have had no problems but was warned when i purchased it to not put too much oil on it when you clean it as to not @!#@! up the MAF. I haven't noticed a performance gain with the K&N, however when the stock one was put back in i noticed how quiet my engine was when reving hard. I don't like it at all so im putting in another k&n(i like the noise)
Pros: no problems, preferred engine noise
Cons: no performance gain, requires careful oiling
Vehicle:
Volkswagen Passat
Mileage: 19000 km
I once took my maf housing out and it was really dirty... I had a K&N drop in BTW I think it flows better but it flows too much crap too.
Pros: flows better
Cons: MAF housing dirty, flows too much crap
Vehicle:
Volkswagen
The only effect you should notice is larger chunks of debris getting into your engine. This may cause some more noise.
Cons: larger debris into engine, more noise
Vehicle:
Volkswagen
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