spark plug
 

I am needing new spark plugs for a 2006 Chevrolet HHR and I was wondering what the difference was between the AC DELCO 41-103 and 41-105. I don't see anyone selling the 41-103 like someone suggested I get.

I found the 41-103 plugs at Autozone and Advanced autoparts online like here

shop.advanceautoparts.com/p/acdelco...iridium...41-103/15650269-

it shows this fits the 2.4 liter engine for the 2006 model

the 41-105 shows for the 2.2 liter engine for the 2006 model

Good job Oldblue!:thumb:

The 2006 2.2L Ecotec engine was a Generation I version of the power plant, hence the requirement for Iridium 41-105 plugs.

2007 and newer Ecotec engines use the revised Generation II block and cylinder head, hence a different plug number.

There are enough differences between the '06 and '07 Ecotec 2.2 engines, both minor and major, that the 2006 engines are really considered "stand alone" models.

So screw in the correct plugs and drive on!!