A bold statement like that takes corporate balls, big balls and for that we give K&N a lot of props and respect. Furthermore K&N has stepped up and offered an impressive engine protection warranty. K&N will warranty your motor if a properly maintained and installed K&N product damages it and causes the OEM warranty to be declined. Here is the policy verbatim.
|Oil is applied to the filter material. Many OEM's suspected that the oil was causing MAF failures, K&N's testing found this not to be true and they will stand behind you.|
ENGINE PROTECTION LIMITED WARRANTY
“Unlike many companies, our warranty for O/E replacement air filters and intake systems does extend beyond the replacement of a defective K&N part. For the original purchaser of the product, our warranty covers any engine damage or related costs incurred as a direct result of the use of a properly installed and maintained K&N O/E replacement air filter or intake system on the specific vehicle for which the product was designed to be used by K&N. This includes reasonable vehicle repair costs, sensor replacements, car rental fees or other incidental expenses directly related to an engine problem caused by the failure of a K&N product. Furthermore, we warrant that using our product will not result in a vehicle warranty denial. K&N will not be responsible for any indirect, consequential, special, contingent, or other damages not listed above.
We will promptly reimburse the consumer for the cost of the repair if a service provider denies warranty coverage as a result of a K&N product or claims that a K&N product has caused harm to your engine or vehicle. In order to receive reimbursement, we require each of the following: “