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

Replacing Engine Spark Plugs

Model: BMW Serie 3 E46 - Years 1998-2006
Part: Spark plugs

Start by removing the cabin air filter housing using a ratchet wrench to unscrew the four screws and remove the rubber gasket. Remove the strut bar by unscrewing the corresponding bolts. Take off the engine cover by unscrewing the six bolts, being careful not to drop them into the engine, and unscrew the oil cap. Disconnect the ignition coil wires; the first spark plug is located at the bottom of the well. Pull the connector straight up. To avoid mixing up the wires, disconnect only the first spark plug. Using the appropriate spark plug socket, which has a rubber gripping device, gently insert it onto the spark plug and unscrew it. Be careful not to drop any foreign objects into the well. Replace the spark plug with one of the same model, carefully inserting it into the well, still using the appropriate socket, and turn it gently while ensuring it screws in correctly. If you feel resistance, remove it and try again. The spark plugs should be tightened with a torque wrench; if you do not have one, tighten them without overdoing it. Repeat the same process for the other spark plugs.

Updated on 4 February 2026 by ScegliAuto

Video tutorial

Related tutorials

Replacing Spark Plugs on BMW 3 Series
Replacing Spark Plugs on BMW 3 Series
BMW Serie 3 (1998-2006 / E46) Lift the hood by pulling the lever inside the cabin. Using a pair of channel lock pliers, wiggle the connection point between the spark plug wires an…
Checking and Replacing Spark Plugs
Checking and Replacing Spark Plugs
BMW Serie 3 (1990-2001 / E36) This video explains how to replace the spark plugs and their gaskets on a BMW 3 Series. After removing the retaining screws, take off the plastic cov…
How to Replace Spark Plugs on a BMW 3 Series?
How to Replace Spark Plugs on a BMW 3 Series?
BMW Serie 3 (1998-2006 / E46) To replace the spark plugs on a BMW 3 Series, open the hood and loosen the bolts securing the plastic cover on top of the engine compartment. Once th…

Other guides you may be interested in

How to Open a Stuck Boot on the Peugeot 407?

On the Peugeot 407, the boot may become stuck, possibly due to a problem with the control button or the lock actuator. In such cases, you can perform an emergency opening by following the simple procedure shown in this tutorial. First, open the rear doors, then lower the seat back by operating the release lever. Next, go inside the boot, locate the lock, and manually operate it using a flathead screwdriver. The boot will then be free to open.

Watch the video!


by ScegliAuto

More videos