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There were only two engine choices for the 2004 Matrix. The base, XR, and XR AWD trim levels have the 1ZZ-FE engine coupled to a 4-speed automatic or 5-speed manual. The high output Matrix XRS 2ZZ-GE engine, was only available with a 6-speed manual, only the 2003 model year Matrix XRS was the oddball one, as it was available with a 4-speed auto or 6-speed manual.
For the 1ZZ-FE engines, OEM plugs are - NGK IFR5T11 or Denso IK16
For the 2ZZ-GE engines, OEM plugs are - NGK IFR6T11 or Denso IK20
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2002 Corolla S, 1.8L 1ZZ-FE VVT-i
2003 Matrix XRS, 1.8L 2ZZ-GE, VVTL-i (RIP)
2009 Matrix XRS, 2.4L 2AZ-FE VVT-i
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