My ex daughter-in-law's 2008 Civic.... The filter is behind the engine, above the transmission on the driver's side (LHD). The filter is small and easy to miss. The entire air box needs to come out, and even then it is a royal PITA. Even if it was my car I'd never do it again. I was cursing like madman.I have a 2005 Civic as well and didn't know it had an inline filter. Where is it located and could you you take a picture of it? I just did a drain and fill last night on the transmission with DW1. Thanks Mainia
Scott