Maintenance / 2004 Civic Hybrid · Automatic (variable gear ratios) · 4 cyl · 1.3 L · EPA 39/43 mpg city/highway

Engine coolant

Check the reservoir level with the engine cold and investigate repeated coolant loss. Coolant type and replacement procedure matter as much as capacity.

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IntervalFirst 120,000 mi (192,000 km) or 10 years; then 60,000 mi (96,000 km) or 5 years, whichever comes first.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.

Coolant specification: Honda All Season Antifreeze/Coolant Type 2, premixed50% antifreeze/50% water; do not add straight antifreeze or plain water. Verified
Engine coolant capacity: 5.4 US qt VerifiedOriginal total-system capacity, not the amount drained or a purchase quantity. The separate change row includes reservoir coolant and coolant remaining in the engine; numeric change quantity is not adopted.

Cooling-system precautions: Never open a hot pressurized cooling system. A total-system capacity is not necessarily the amount that drains during a routine change; follow the engine-specific bleeding procedure.

Source

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, Engine coolant replacement row; exact Hybrid application established by PDF1 and PDF3/printed i.; Original Honda2004 Civic Hybrid owner manual CH0404OM.pdf, PDF151/printed148, Engine coolant replacement row; exact Hybrid application established by PDF1 and PDF3/printed i.Coolant specification: Original Honda2004 Civic Hybrid owner manual CH0404OM.pdf, PDF158/printed155, Engine Coolant / Type2 premix; exact Hybrid application established by PDF1 and PDF3/printed i.Engine coolant capacity: Original Honda2004 Civic Hybrid owner manual CH0404OM.pdf, PDF207/printed204, Capacities / Engine coolant total / CVT; exact Hybrid application established by PDF1 and PDF3/printed i.