Microscopic, electronic and chemical testing revealed that none of these sensors were contaminated by K&N oil (K&N Detailed MAF Sensor Test Results). In the last 7 years, we have had more than 300 actual sensors sent to us by consumers with documents showing dealerships claimed our product had caused them to fail. No dealership or service provider, when contacted, has ever been able to provide us with evidence to support this 'myth,' and in fact, our investigations have revealed that even authorized dealerships are simply speculating and do not have the test equipment necessary to know whether the sensor has failed or why. Sold over 10,000,000 lifetime air filters and received only a few hundred calls from consumers whoĪre having dealership or service provider challenges. In our opinion, it is an excuse for a dealershipĪnd/or the vehicle manufacturer to avoid a legitimate warranty repair. This allegation not real, it is not even possible. Provided to support this 'myth' and years of diagnostic testing by K&N has shown that not only is That a vehicle's MAF sensor can be contaminated by K&N filter oil.

We are aware of the 'urban myth' created by a few dealerships The rest of this discussion is about a minority of dealerships who are Most dealerships provide excellent service and fulfill car warranty obligations without issue,Īrgument or tardiness. OVER.' In our opinion, this is why some dealerships or service providers may attempt to discourageĪ consumer from using a K&N air filter or worse blame a vehicle repair on our lifetime air filter. Technicians see this sticker it means 'STOP SELLING THIS CUSTOMER DISPOSABLE AIR FILTERS OVER AND Not throw away your K&N air filter because it will last for the life of your vehicle. The sticker is to alert service technicians that they should

Every stock replacement air filter we sell comes with this sticker, which we advise consumers to

Duramax mass air flow sensor problems