Maintenance / 2004 Civic Hybrid · Automatic (variable gear ratios) · 4 cyl · 1.3 L · EPA 39/42 mpg city/highway

Spark plugs

Use the engine-specific plug type. Check the service schedule and inspect ignition faults before replacing parts.

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IntervalReplace at110,000 mi (176,000 km) on the published normal and severe charts.Verified

01 / Requirements

Configuration-specific service and fitment facts

These sourced values are shared by the specification sheet and the maintenance guides for this exact configuration.

Cylinders: 4 Verified
Spark plug specification: NGK IFR5G-11K or DENSO SK16PR-L11 Verified

Installation: Work on a cooled engine using the specified tightening procedure. Do not adjust a fine-wire plug gap unless its manufacturer explicitly permits it.

Source

FuelEconomy.gov model-year bulk vehicle records

Source ↗

Official bulk configuration, engine, transmission, drivetrain, fuel-economy, volume, and emissions records; the official record API is the bounded fallback.

United States, complete imported model years 1984, 1985, 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024, 2025, 2026Cylinders: FuelEconomy.gov vehicle record 19589, cylinders

2004 Honda Civic Hybrid Owner’s Manual (CH0404OM)

Source ↗

Honda-hosted original; title and introduction explicitly identify2004 Civic Hybrid. Original equipment and publication-era fluids are retained as dated evidence, not a current replacement-product or supersession claim.

United States model-year2004 Civic Hybrid, four retained EPA Hybrid records19588–19591. MT and CVT branches remain separate. ULEV/AT-PZEV tank variants and ABS-dependent spare tires are not assigned. Not applicable to gasoline1.7L, Si2.0L or GX CNG.Original Honda2004 Civic Hybrid owner manual CH0404OM.pdf, PDF150/printed147, Spark plug replacement row; exact Hybrid application established by PDF1 and PDF3/printed i.; Original Honda2004 Civic Hybrid owner manual CH0404OM.pdf, PDF151/printed148, Spark plug replacement row; exact Hybrid application established by PDF1 and PDF3/printed i.Spark plug specification: Original Honda2004 Civic Hybrid owner manual CH0404OM.pdf, PDF207/printed204, Engine / Spark plugs; exact Hybrid application established by PDF1 and PDF3/printed i.