Ramair Performance Foam Replacement Air Filter for BMW 118d, 120d, 318d, 320d & 520d

Upgrade your BMW’s breathing with the Ramair Performance Foam Replacement Air Filter (SKU: RPF-1552). Designed to replace the inefficient OEM paper filter, this high-performance foam panel improves airflow, sharpens throttle response, and delivers better filtration to protect your diesel engine. Built using Ramair’s twin-layer Aeriform foam and reinforced with a stainless steel cage, this filter offers strength, durability, and reusable performance—cleanable with the CK-003 maintenance kit. Engineered for perfect fitment in the OEM airbox, it provides a clean installation and long-term reliability.

Key Features

• High-performance, MAF-safe twin-layer Aeriform foam construction

• Stainless steel cage for structural integrity and durability

• Rubberised polymer surround for secure and clean fit in OEM airbox

• Reusable design – easy to clean with Ramair CK-003 filter maintenance kit

• Improves airflow, throttle response and diesel efficiency

• Precision dimensions and durable materials for long service life

• Lifetime guarantee against manufacturing defects (single user)

Compatibility

This filter is compatible with the following BMW diesel models:

Filter Specs

• Length: 370mm (14.5")

• Width: 147mm (5.8")

• Shape: Oval

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.