Spark Plug length issues for P1 & P2 Volvos
The thicker head appears on all P1 models and later P2 models (S60 T5, V70 T5, S60R & V70R models.) It also appears that the newer P3 (2007-) 6 cylinder engine uses the longer style plugs.
Shorter Plug
1993-1997 850
1998-2000 S70
1998-2000 V70/V70XC
1998-2004 C70
2001-2006 S60 Non-Turbo
2001-2002 S60 "2.4T" LPT
2003-2005 S60 "2.5T" LPT
2001-2005 S60 "T5" w/2.3T
2001-2007 V70 Non-Turbo
2001-2002 V70 "2.4T" LPT
2003-2007 V70 "2.5T" LPT
2001-2005 V70 "T5" w/2.3T
2000-2004 V40
2000-2004 S40 (4 CYL)
1999-2006 S80 5 & 6 CYL
2007-2011 S80 V8
2003-2006 XC90 5 & 6 CYL
2003-2011 XC90 V8
Longer Plug
2005-2011 V50
2005-2011 S40 (5 CYL)
2007-2011 C30
2006-2011 C70
2004-2007 S60 "R" (2.5T)
2006-2009 S60 "T5" w/2.4T
2004-2007 V70 "R" (2.5T)
2006-2007 V70 "T5" w/2.4T
2008-2011 V70 6 CYL
2008-2011 XC70 6 CYL
2007-2011 S80 6 CYL
2007-2011 XC90 6 CYL
2010-2011 S60
2010-2011 XC60
ipd carries Volvo OEM spark plug kits at and affordable price plus aftermarket spark plugs from a variety of manufacturers (Bosch, Denso, etc.)