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Upgrade your BMW with the K&N Engineering High-Flow Replacement Air Filter designed specifically for BMW F/I models from 1978 to 1991. This washable, reusable filter features advanced layered, oiled cotton media engineered to optimize airflow while capturing harmful contaminants, resulting in improved engine performance. With its easy drop-in installation into your factory air box, it provides a seamless upgrade that enhances horsepower and maintains engine protection. Backed by K&N's 10-Year/Million Mile Limited Warranty, this filter is built to last the entire lifespan of your vehicle, making it a reliable choice for enthusiasts seeking durability and performance. The filter's design not only boosts airflow but also ensures exceptional filtration, helping your engine run efficiently under various driving conditions. Investing in this high-performance filter can lead to noticeable gains in power and acceleration, all while reducing the need for frequent replacements. The K&N replacement air filter combines quality craftsmanship with a commitment to sustainability, as its reusable nature reduces waste and recurring costs. Ideal for enthusiasts and everyday drivers alike, it offers a straightforward upgrade that delivers lasting performance and peace of mind, making it a popular choice for BMW owners seeking superior airflow and engine efficiency.
Features:
Fitment:
1975 BMW 3.0Si Base
1976 BMW 3.0Si Base
1977 BMW 530i Base
1977 BMW 630CSi Base
1978 BMW 530i Base
1978 BMW 630CSi Base
1978 BMW 633CSi Base
1978 BMW 733i Base
1979 BMW 528i Base
1979 BMW 633CSi Base
1979 BMW 733i Base
1980 BMW 320i Base
1980 BMW 528i Base
1980 BMW 633CSi Base
1980 BMW 733i Base
1981 BMW 320i Base
1981 BMW 528i Base
1981 BMW 633CSi Base
1981 BMW 733i Base
1982 BMW 320i Base
1982 BMW 528e Base
1982 BMW 633CSi Base
1982 BMW 733i Base
1983 BMW 320i Base
1983 BMW 528e Base
1983 BMW 533i Base
1983 BMW 633CSi Base
1983 BMW 733i Base
1984 BMW 318i Base
1984 BMW 325e Base
1984 BMW 528e Base
1984 BMW 533i Base
1984 BMW 633CSi Base
1984 BMW 733i Base
1985 BMW 318i Base
1985 BMW 325e Base
1985 BMW 528e Base
1985 BMW 535i Base
1985 BMW 635CSi Base
1985 BMW 735i Base
1986 BMW 535i Base
1986 BMW 635CSi Base
1986 BMW 735i Base
1986 BMW L7 Base
1987 BMW 535i Base
1987 BMW 635CSi Base
1987 BMW 735i Base
1987 BMW L6 Base
1987 BMW L7 Base
1988 BMW 535is Base
1988 BMW 635CSi Base
1988 BMW M3 Base
1989 BMW 635CSi Base
1989 BMW M3 Base
1990 BMW M3 Base
1990 Yugo Cabrio Base
1991 BMW M3 Base
1991 Yugo Cabrio Base
1992 Yugo Cabrio Base
Order Processing
All orders are processed and shipped within 24 hours of purchase (excluding weekends and holidays).
Orders placed after 3:00 PM EST may ship the following business day.
Shipping Methods
Customers select their preferred shipping method and speed at checkout.
Shipping times are determined by the carrier and cannot be guaranteed by us.
Tracking information will be provided once your order has shipped.
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).
