K&N 33-2599 (KN 33 2599) Reusable, Washable, Serviceable Engine Air Filter, Drop-In Panel OEM Replacement for BMW 525 (E34 1988-on), Ford Escort Mk4 1.8D & Orion Mk2 1.8D (1988-1990) – Cotton Gauze Performance Airbox Insert

K&N 33-2599 Serviceable Panel Insert for BMW 525 and Ford 1.8D Applications

Give your engine a freer-breathing intake with the K&N 33-2599. This premium cotton gauze air element slides into the factory air box for a like-for-like fit, helping improve airflow, throttle crispness and driveability without any ECU work. It is a cleanable, long-life solution that replaces throwaway paper elements and is ideal for daily drivers and enthusiast builds alike.

At MJ Modifications we run this filter ourselves and have supplied it to many happy customers. Feedback is consistently positive for fit, sound, response and long-term value. If you want a simple induction upgrade that you can maintain and reuse, the K&N 33-2599 is a brilliant choice.

Key benefits

• Factory-spec fitment for quick installation in the stock air box
• High airflow cotton media to support sharper pedal response and smooth revs
• Cleanable, serviceable filter element for long-term savings versus disposable paper filters
• No remap required and works with standard servicing intervals
• Durable construction from a world-renowned intake brand

Who is it for

Ideal for drivers seeking a straightforward induction refresh, those looking to support future tuning, and anyone who wants a reusable engine air filter that can be cleaned and refitted. Great for improving intake efficiency while keeping the car original with the factory air box.

Vehicle applications

Please verify compatibility for your specific model. Known fitments include:

• BMW
  • BMW 525 2.5 1988-on
• Ford
  • Escort
  • Escort Mk4 Hatchback (GAF, AWF, ABFT)
  • 1.8 D (44 kW / 60 hp) (01/1989 - 07/1990)
  • Escort Mk4 Estate (AWF, AVF)
  • 1.8 D (44 kW / 60 hp) (01/1989 - 07/1990)
  • Escort Express 86 (ALF)
  • 1.8 D (44 kW / 60 hp) (07/1988 - 07/1990)
  • Orion
  • Orion Mk2 (AFF)
  • 1.8 D (44 kW / 60 hp) (01/1989 - 07/1990)

Fitment check before we ship

To make sure you receive the correct part, we run a compatibility check prior to dispatch. Add your UK registration at checkout or provide the last 7 digits of your VIN.

Installation and fitting support

The K&N 33-2599 is a direct slot-in swap using the original air box and clips. Prefer professional fitting or a health check on your intake system? Book in with MJ Modifications in Warwickshire. Email info@mjmodifications.co.uk for a fitting quote.

Care and maintenance

When the element becomes dirty, simply clean and re-oil with an appropriate filter service kit, then refit. This makes it a cost-effective, eco-friendly alternative to single-use paper elements.

Part number

K&N 33-2599

Why buy from MJ Modifications

We use what we sell. Our team has hands-on experience with the K&N 33-2599 across customer cars and our own vehicles, and our buyers rate it for quality, fit and longevity. Need guidance on intake options or compatibility? Get in touch and we will help you choose the right engine filter for your build.

Popular search terms

K&N 33-2599 filter, KN 33 2599, K and N air filter 33-2599, lifetime engine filter, cleanable cotton filter, reusable intake filter, panel insert for BMW 525, Ford Escort diesel air filter, Ford Orion 1.8D air element, performance intake upgrade, cotton gauze filter, stock airbox insert, direct fit engine filter, serviceable panel filter.