Greetings all,

How do I find out which engine variant I have in my 2005 S40? I'm trying to buy some O2 sensors for it but don't know how to determine if it is the B5244S4 engine or the B5244S7 engine?

Thanks in advance for the help!

 

a few ways - 1) look for a sticker on the timing belt cover 2) look for a build plate under the hood. 3) use a VIN decoder.

Spoiler - if your 6/7 digit in the VIN is 38, you have the S4, 39 is the S7. The S7 is the SULEV+ Cali edition of the 2.4i