• Smart Fortwo 451 engine air filter – product photo 1
  • Smart Fortwo 451 engine air filter – product photo 2
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Filters & Maintenance

Smart Fortwo 451 Engine Air Filter (2008–2015)

Smart Fortwo 451 Engine Air Filter (2008–2015)

5.0 · 10 reviews
$25.00
$25.00
Sale Sold out
Shipping calculated at checkout.
Fits
Smart 451

Not sure it fits? Ask in chat with your year and trim for an instant answer.

  • Direct-fit replacement for the Smart Fortwo 451
  • Blocks dust, dirt, leaves and debris
  • Easy install, no modifications
  • Routine maintenance item for dusty trail use
10% off Part of the Smart 451 Full Send Kit

Goes with this

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Details & specs

Overview

Your engine breathes what your tires kick up. Keep it clean with a direct-fit engine air filter for the Smart Fortwo 451. It stops dust, dirt and debris before they reach the engine.

Why it's worth it

  • Blocks dust, dirt, leaves and debris from entering the engine
  • Protects engine components from wear and lost performance
  • Maintains clean airflow for efficient combustion
  • Supports engine longevity and smooth, reliable operation
  • Smart pick for lifted cars that see dusty trails and mud

Fitment

Fits the Smart Fortwo 451, 2008–2015.

Install

Direct-fit replacement for your factory filter. Easy install, no modifications needed.

Details

Recommended as part of your routine maintenance to keep performance where it should be. A lifted Smart sees a lot more dust, mud and trail grit than a stock Fortwo, so a clean filter matters. Pair it with our carbon cabin air filter for a complete filter service.

Specs
FitmentSmart Fortwo 451 (2008–2015)
TypeEngine air filter
InstallDirect-fit replacement
Install

Direct-fit replacement for the factory filter. No modifications needed.

Prefer a pro? Any trusted mechanic or collision shop can install it. Ask for our shop write-up through our contact form.

Shipping & returns

Free shipping in the lower 48. Same-day shipping on select items ordered by 1 pm PT, Mon–Fri, from Elk Grove, CA or Beaverton, OR.

1-year warranty on parts we make. 30 days on everything else. 30-day returns (20% restocking fee), and nothing is final sale.

Full shipping & returns policy

  • 5 stars: 10 (100%)
  • 4 stars: 0 (0%)
  • 3 stars: 0 (0%)
  • 2 stars: 0 (0%)
  • 1 star: 0 (0%)
K
Kevin L.
Small Upgrade That Helps

Did this during routine maintenance and it was totally worth it. Engine breathes better and even has a slightly deeper intake sound.

Thanks for the awesome review, Kevin! - Jeff Stay awesome.

C
Courtney N.
Quality Filter

Fits perfectly and the materials feel high quality. Engine response feels sharper and installation was quick.

Appreciate the kind words, Courtney. Full Send! Find us on IG @littlebigsupply and show off that rig.

E
Evan C.
Easy Install

Took maybe five minutes to swap out. The engine seems to pull a little stronger and sounds great when climbing hills.

So glad you're loving the new Engine Air Filter! Be sure to tag us on Instagram @littlebigsupply. Have a great day!

S
Scott L.
Noticeably Better Throttle Response

Swapped this into my Smart Fortwo and immediately noticed better throttle response. The engine also sounds a little throatier when you get on the gas.

Thanks for the awesome review, Scott! - Jeff Have a great day!

E
Emily H.
Nice Subtle Sound

Didn't expect a sound change but there's a slightly throatier note under acceleration now. Makes the little car feel more lively.

Big thanks from all of us here! Enjoy the Engine Air Filter.

N
Nicholas S.
Perfect Fit

Dropped right into the airbox with no issues. Build quality looks excellent and the car feels smoother when accelerating.

Big thanks from all of us here! Enjoy the Engine Air Filter. Have a great day!

E
Emily G.
Noticeable Difference

The old filter was pretty dirty. After installing this one the engine feels more responsive and the intake noise is a little more pronounced.

Thanks Emily! Glad to hear the Smart Fortwo Engine Air Filter (451) (2008-2015) is performing well for you. Keep it up!

C
Christian F.
Great Replacement Filter

Perfect fit for my Fortwo. Installation took just a couple minutes and the engine feels a bit more eager to rev.

Appreciate the kind words, Christian. Full Send! Find us on IG @littlebigsupply and show off that rig. Have a great day!

J
Jane L.
Improved Airflow

Solid quality filter and a perfect fit for my Smart Fortwo. Definitely feels like the engine is breathing easier.

Thanks Jane! Glad to hear the Smart Fortwo Engine Air Filter (451) (2008-2015) is performing well for you. Stay awesome.

S
Samantha G.
Great Maintenance Upgrade

If you're doing regular service on your Fortwo this is an easy upgrade. Good airflow and the car feels peppier around town.

Thank you! We're stoked that you like the Engine Air Filter. - Jeff Can't wait to see pictures!

Complete the build

Building a Smart 451?

Our flagship 3" bolt-on lift for the 451 Fortwo (Pure, Passion and Brabus). No cutting, no welding, factory mounts, color printed instructions.

Build your kitShop Smart 451 parts