Do it yourself
Frequently asked questions about cars and motorcycles
Car tutorial (Do it yourself) Motorcycle tutorial (Do it yourself) Frequently Asked Questions

Changing Spark Plugs on Smart 450

Model: Smart Smart 450 - Years: 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007
Part: Spark plugs

See other generations:
Video tutorial

From the boot, access the rear compartment by removing the engine cover, as shown in the video, and locate the position of the spark plugs. Use a socket to reach the spark plugs and gently start unscrewing them counterclockwise.

Take the new spark plug and insert it clockwise and secure it. To access the other spark plug, remove the right rear wheel arch by taking out screws and bolts, as seen in the video; this will allow you to locate the other spark plug. Follow the same removal procedure described earlier, unscrewing counterclockwise to remove the spark plug and replace it with the new one.


Updated on 10 March 2026 by ScegliAuto


Related tutorials

Removing Spark Plug Caps from a Smart Fortwo
Removing Spark Plug Caps from a Smart Fortwo
Smart (1998-2007 / 450) In this video, you will learn how to remove the spark plug caps from a Smart 450. The operation is a bit complicated as these caps are housed within …
Guide to Replace the Glow Plugs on a Smart Fortwo 450 Diesel
Guide to Replace the Glow Plugs on a Smart Fortwo 450 Diesel
Smart (1998-2007 / 450) In today's tutorial, you will learn how to remove and replace the glow plugs of the Smart Fortwo 450 Diesel engine, following the instructions below.…
Removing the Gear Knob of the Smart Fortwo 450
Removing the Gear Knob of the Smart Fortwo 450
Smart (1998-2007 / 450) In this video, learn how to remove and replace the original gear knob of the Smart Fortwo 450, as well as the 451 and Roadster, by following these si…

Other guides you may be interested in

How to reset the tyre pressure warning light on the Kia Niro EV?

To reset the tyre pressure warning light on the Kia Niro EV, inflate the tyres until they reach the correct pressure value. This value is indicated on the sticker attached to the driver's door pillar. Once the tyres are inflated, turn on the instrument cluster to check that the warning light has completely disappeared from the display. If it is still present, you may need to drive for a few miles to ensure it disappears completely from the screen.

Watch the video!


by ScegliAuto

More videos