SKU: 59164354328

K&N REPLACEMENT AIR FILTER TO SUIT BMW 4 SERIES 420I N20B20 TURBO 2.0L I4

Sale price$82.80 Regular price$92.00
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USA
  • USA
  • CAN

Ships within 48 hours · Estimated delivery Aug 3 - Aug 8

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Description

K&N REPLACEMENT AIR FILTER TO SUIT BMW 4 SERIES 420I N20B20 TURBO 2.0L I4This K&N replacement air filter is designed to increase horsepower, improve airflow by capturing contaminants and lasts for the entire lifespan of your vehicle. The design of this air filter uses layered, oiled cotton media thus it is washable and reusable. These drop in replacement air filters are specifically designed to fit in your car's factory air box. These filters not only put you at ease as they are easy to install but are also responsible for

This K&N replacement air filter is designed to increase horsepower, improve airflow by capturing contaminants and lasts for the entire lifespan of your vehicle. The design of this air filter uses layered, oiled cotton media thus it is washable and reusable. These drop-in replacement air filters are specifically designed to fit in your car's factory air box. These filters not only put you at ease as they are easy to install but are also responsible for the high performance.

This air filter suits BMW 4 series vehicles fitted with N47D20, B47D20 and N20B0 I4 engines.

Key Features:

  • Provides high air flow with exceptional filtration.
  • Lasts up to 80,000km before cleaning is required depending on the driving conditions.
  • Will NOT void vehicle warranty.
  • K&N 10 year/million mile limited warranty.

Contents:

  • 1 X Air filter

Vehicle Fitment Guide

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 59164354328

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4.4 ★★★★★
Based on 14 reviews
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A
Verified Purchase
Alan Gabriel Jones
Port Orchard, US
★★★★★ 5
Sturdy, high quality, and protective
Color: Green, Size: 15-inch for New MacBook Air
This is my third TomToc laptop sleeve. Each time, I bought another, less expensive brand first and returned it. TomToc offers the best protection in a soft-shell sleeve. Immediately when you open it, you feel the higher quality material and density. It’s not heavy, but it is thick padded and doesn’t easily bend with pressure. The zipper is built to last, sturdy, and easy to operate without that chintzy feeling from cheap zippers. If you pay attention to the construction, you quickly see why it’s about double in price. There is an inner pad to protect the laptop from not just drops and shock, but also from the zipper. The corners are reinforced and add extra protection. It is definitely worth double the price.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 11, 2026
B
Verified Purchase
Bamagreek
Draper, US
★★★★★ 5
Great Protection
Color: Orange, Size: 13-inch for New MacBook Air & Pro
This is a very nice, protective case. The material is thick and cushions the laptop great! Computer fits nice and cozy; great fit. I love the bright orange! I highly recommend.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 23, 2026
A
Verified Purchase
AmazonUser
Fort Morgan, US
★★★★★ 5
Great Laptop Case !
Color: Black, Size: 13-inch for New MacBook Air & Pro
This case is reallllly nice and durable, the cushioned corners is what really makes this case special imo. The outer layer is a nice durable think fabric. It fits perfectly. The only downside is the zipper traction is not as smooth as I would like ,,, but I guess I can fix that with some oil/wd40. I would recommend this laptop case ! 👌🏽👌🏽👌🏽
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Reviewed in the United States on March 24, 2026
I
Verified Purchase
IceCreamTaco
Lexington, US
★★★★★ 5
It’s perfect!
Color: Light Blue, Size: 15-inch for New MacBook Air, Color: Light Blue, Size: 15-inch for New MacBook Air
This case matches my MacBook Air perfectly! It’s definitely going to protect your laptop and it’s really well built and designed. So glad I went with this case than the other brands!
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Reviewed in the United States on May 18, 2026
N
Verified Purchase
Nosferatu
Los Angeles, US
★★★★★ 4
Better Lips, Better Fit, Less Nonsense
Color: Black, Size: 13-inch for New MacBook Air & Pro
I tested this sleeve with a 13.6” MacBook Air (M4), and the difference is immediately noticeable. First thing: fit. This one actually holds the laptop in place. The padded “lips” in the corners create just enough resistance that you have to guide the MacBook in and out. It’s not a loose drop-in like other cases — it feels controlled. If I shake it, there’s barely any movement, which is exactly what I was looking for. Second: build quality. The stitching is clean and consistent — almost surgical compared to the wrinkled mess I saw on another model. The outer fabric stays flat, no weird waves or cheap-looking folds. The interior lining is softer and thicker too, so it feels more protective without being bulky. Third: structure. I even did a quick “real-world” test — stood it vertically on a mattress, zipper open, applied pressure from the top — and it held its shape. The other case I tried would have collapsed immediately. This one actually feels like it can handle normal use without transferring pressure straight into the laptop. The external pocket is simple but practical. It fits the charger brick and cable without interfering with the main compartment, which keeps the laptop fit intact. Only downside: I could do without the orange accents. A full black version would be perfect. But honestly, that’s cosmetic — functionally, this one does what it’s supposed to do. At around this price point, this feels fair. Not luxury, not overhyped — just a well-executed, practical sleeve that gets the fundamentals right. Bottom line: not perfect, but finally something that feels properly made and actually holds the laptop instead of just surrounding it.
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Reviewed in the United States on March 29, 2026

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