NGK (3199) BKR6EQUP Multi-Ground Spark Plug, Pack of 1

This is the correct plug for most E46 Series BMWs. The price is a small fraction of the dealer cost. It is of the same high quality as every other original part on your BMW. The other clear choice for plugs is the Bosch. Both are of equivalent, superb quality.

BMW rates either the Bosch or the NGK plug for 100,000 miles when used on an E46. People who do their own work often change them at 50,000 miles and experience faster starts. Getting access to the cylinder head requires the removal of four "Torqx" head bolts which secure the cabin ventilation cowl the the front of fire-wall above the aft portion of the engine. This is the only real barrier to entry, and it is a deliberate one to keep tinkerers away from the engine. (BMW keeps the unskilled away from their engines by making the engine cover removal non-obvious). There are many good videos on Youtube on how to do this. If you have not seen someone else do the job before, the task will be made easier by watching...Read more

For those people who are scared to try outside the dealership, buy this. When I took out the originals guess what.....they are the same company except BMW written on them along with the NGK name. They fit very well. My car idles at much lower rpm (BMW 323i). Changed them in less then a hr. will be definitely buying car products from amazon in future.

exact same as oem bmw. changed at 78k when manufacter says 100k. wish I had of changed @ 65k miles as big performance difference.