2003 Honda Civic Service and Repair Manual

This 2003 Honda Civic factory service and repair manual is built for one year, one set of engines and one lineup of trims, so the torque values, wiring diagrams and diagnostic steps inside are the figures Honda actually published for this car — not a nearby model year's approximation.

Engines covered

• 1.3L inline-four full hybrid — SOHC, naturally aspirated, gasoline
• 1.7L inline-four — SOHC, naturally aspirated, gasoline or CNG
• 2.0L inline-four (122 cu in) — DOHC, naturally aspirated, gasoline

Body styles covered

• 4-door sedan
• 2-door coupe
• 2-door hatchback

Trims covered

• DX
• EX
• GX
• HX
• Hybrid
• LX
• Si
• SiR

Known issues on the 2003 Civic. Twenty-four recalls are on federal record for this model year. The largest cluster covers Takata driver- and passenger-side frontal air bag inflators, which can rupture on deployment and throw sharp metal fragments at occupants, causing serious injury or death; a related recall addresses a front passenger air bag that may have been installed incorrectly during replacement, causing it to deploy improperly. A separate recall covers the ignition switch interlock lever, which can deform and allow the key to be removed before the automatic transmission is shifted into Park, letting the vehicle roll away. The CNG-equipped Civic carries its own recall for the compressed natural gas tank, where uneven heating in a severe interior fire can prevent the pressure relief device from venting and risk a tank rupture or explosion. A separate factory recall covers the headlight switch wiring harness, where melted terminal ends can knock out the low-beam headlights and reduce driver visibility. One recall also covers replacement tempered glass from a glass supplier that fails to break into small pieces as intended, risking injury from shattered glass in a crash. The remaining twelve recalls are aftermarket exterior lighting — replacement headlamp and combination lamp assemblies sold for this Civic that lack the required amber side reflectors, reducing visibility to other drivers. Owners have filed 524 complaints for the year. The factory diagnostic and repair procedures behind each of those systems are here.

From an air bag inflator inspection to chasing the ignition interlock fault or servicing the CNG fuel system, it keeps you on the OEM procedure and the correct specification for your specific 2003 Civic.