K&N Air Filter 33-3134 For BMW X3 X4 M40i, X5 M50d, M550d, 750d & Alpina D5 3.0L Engines (2016–2025)

Upgrade your BMW’s performance with the K&N 33-3134 High-Flow Air Filter, designed to deliver improved airflow, increased horsepower, and long-lasting filtration efficiency. Featuring K&N’s renowned layered oiled cotton media, this washable and reusable panel filter offers up to 99% filtration efficiency while maintaining superior airflow to the B58 and B57 3.0L engines found across BMW’s M40i, M50d, M550d, 750d, and Alpina D5 models. Built with premium materials for rugged durability, the 33-3134 is pre-oiled and ready to drop straight into your factory air box—no modifications required. Backed by K&N’s No-Hassle Lifetime Limited Warranty, this filter can be cleaned and reused every 75,000 miles, saving money over disposable alternatives while reducing environmental waste.

Key Features

• Enhanced Engine Performance: Improves horsepower, throttle response, and overall efficiency.

• Premium Build Quality: Crafted from multi-layered oiled cotton gauze with a precision-moulded rubber frame.

• Long Service Interval: Clean and re-oil every 75,000 miles under normal driving conditions.

• Lifetime Use: Designed to last for the lifespan of your vehicle with K&N’s lifetime warranty.

• Eco-Friendly Solution: Reusable design reduces landfill waste from disposable filters.

• Quick Installation: Direct replacement for your factory air filter—no tuning or modification needed.

Compatibility

Fits the following BMW 3.0L L6 petrol and diesel models (2016–2025):

• BMW X3 M40i (G01)

• BMW X4 M40i (G02)

• BMW X5 M50d (G05)

• BMW M550d (G30/G31)

• BMW 750d (G11/G12)

• Alpina D5 (G30)

Technical Specifications

• Filter Type: Washable & Reusable Panel Air Filter

• Material: Oiled Cotton Gauze

• Height: 41 mm (1.625 in)

• Length: 270 mm (10.625 in)

• Width: 214 mm (8.406 in)

• Efficiency: Up to 99%

• Warranty: K&N No-Hassle Lifetime Limited Warranty

Unless explicitly stated otherwise, all products sold by R44 Performance Limited are designated RACE ONLY and are solely for competition or off-road use limited to racing formally sanctioned by a recognized racing organization. Any other use, including recreational off-road use, may violate local, state, and Federal laws. R44 Performance Limited does not implicitly or explicitly confirm the legality of using any products it sells on public roads; that is entirely the responsibility of the consumer.

It is the responsibility of the customer to check with all federal, state local and environmental laws before ordering and installing a product. R44 Performance Limited is not responsible for any fees, fines or costs that a customer may incur as a result of failing to check with federal, state, local or environmental laws before ordering and installing a product.

We get a large number of custom orders and requests everyday, so as a result it is not always possible for us to keep every item in stock at all times in our warehouse. If you require the item urgently please contact our sales team here to check the stock before you make your purchase.

We totally understand if you're not certain a part will be compatible with your car, so we highly recommend contacting us here with your query. Our friendly sales team will then be in touch to confirm if this part is the correct part you are looking for.

All in stock products ship the same day if ordered before 2pm GMT

For out of stock items we will contact you with an estimated wait time if not otherwise specified above.

We offer worldwide shipping on all products. If upon receiving your product you wish to return; we offer a 30-day returns policy. For our in-depth returns information please follow the link. "R44 Returns Policy

All of our products come with a standard warranty of 1-3 years. This is dependant on the type of product however. For more details please see our warranty page here.