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Upgrade your BMW 335i or M135i with the K&N Replacement Air Filter Part Number knn33-2997, engineered for enhanced airflow and engine performance. Crafted from layered, oiled cotton media, this high-flow air filter is designed to improve horsepower and acceleration by optimizing the air intake process. Its state-of-the-art design captures contaminants effectively while allowing greater airflow, ensuring your engine operates efficiently and with increased power. This filter is a direct drop-in replacement, making installation straightforward without the need for modifications or tools. Built to withstand the rigors of daily driving, it is reusable and engineered to last for the entire lifespan of your vehicle, backed by K&N's 10-Year/Million Mile Limited Warranty. The durable construction ensures long-term performance, providing not only increased engine power but also reliable protection against dirt and debris that could harm your engine. This filter is suitable for various BMW models including 2012-2015 BMW 335i, 2014 BMW 435i, and 2014 BMW M235i, fitting seamlessly into the existing air box for a hassle-free upgrade. With a focus on quality and performance, K&N's high-flow air filters are the preferred choice for drivers seeking maximum efficiency and durability from their vehicle*s intake system. Enhance your driving experience today by installing this premium, reusable air filter and enjoy superior airflow and engine protection. Compatible with models that demand a high-performance, long-lasting air filtration solution, this filter is an excellent investment in your vehicle's future performance. Trust K&N Engineering, a leader in automotive air filtration, to deliver quality and reliability for your BMW.
Features:
Fitment:
2012 BMW 335i Base
2013 BMW 335i Base
2013 BMW 335i xDrive Base
2013 BMW ActiveHybrid 3 Base
2014 BMW 335i Base
2014 BMW 335i GT xDrive Base
2014 BMW 335i xDrive Base
2014 BMW 435i Base
2014 BMW 435i xDrive Base
2014 BMW ActiveHybrid 3 Base
2014 BMW i8 Base
2014 BMW M235i Base
2015 BMW 335i Base
2015 BMW 335i GT xDrive Base
2015 BMW 335i xDrive Base
2015 BMW 435i Base
2015 BMW 435i Gran Coupe Base
2015 BMW 435i xDrive Base
2015 BMW 435i xDrive Gran Coupe Base
2015 BMW i8 Base
2015 BMW M235i Base
2015 BMW M235i xDrive Base
2016 BMW 335i GT xDrive Base
2016 BMW 435i Base
2016 BMW 435i Gran Coupe Base
2016 BMW 435i xDrive Base
2016 BMW 435i xDrive Gran Coupe Base
2016 BMW i8 Base
2016 BMW M2 Base
2016 BMW M235i Base
2016 BMW M235i xDrive Base
2017 BMW i8 Base
2017 BMW M2 Base
2018 BMW M2 Base
2019 BMW M2 Competition
Order Processing
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Shipping Coverage
If your package arrives damaged, please notify the delivery driver immediately and contact the shipping carrier to file a claim.
You must report any missing or damaged items within 14 days of delivery.
After this time, we cannot be held responsible for lost or damaged items.
Return Window
You have 30 days from the date of delivery to request a return.
After 30 days, we are unable to accept returns, exchanges, or refund requests.
Eligibility
Items must be returned in their original condition—unused, unwashed, and with all tags and packaging intact.
Certain products may not be eligible for return (e.g., special-order items, customized products, or perishable goods).
Items that have been altered, installed, or modified cannot be returned.
Return Process
Contact our Customer Support team to request a Return Authorization (RMA) before sending items back.
Once your return is approved, you’ll receive instructions on where to send the product.
Customers are responsible for return shipping costs unless the item was defective or incorrect.
Refunds
Refunds are issued to the original payment method once the returned item has been received and inspected.
Please allow 5–10 business days for the refund to appear on your account.
In some cases, a restocking fee may apply (if applicable, this will be disclosed during your return authorization).
