2003 Honda Civic Si Repair and Maintenance

A guide to problems, costs, maintenance and repair for your 2003 Honda Civic Si

2003 Honda Civic Si Problems

PCM software update to correct fause oxygen sensor code
On the HX model, the Powertrain Control Module (PCM) can misinterpret oxygen sensor data and set a false Check Engine light (MIL). A software update from Honda is needed for this issue.
Warped Front Brake Rotors May Cause Vibration When Braking

The front brake rotors can warp and cause a vibration when braking. The rotors will need to be machined or in cases where they are worn to thin, replaced to correct this issue.

Check engine light on due to excessive second clutch wear
Excessive second clutch wear (automatic transmission) can cause the car not to move and set a Check Engine light (MIL). Replacing the transmission is necessary when this happens.

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2003 Honda Civic Si Questions

type of catalytic converter (1 answer)

What type/brand of catalytic converter does Honda Civic Si 2l 2003 use?

Daytime lights out (1 answer)

Problem with daytime running/parking lights fuse keeps blowing, changed them 3times this month and keeps going now they just blow as soon as I turn them on. There's no splicing or anything on the wires, completely stock, also the dash lights are out to.

exact position of the iac valve (2 answers)

am trying to find the iac so i can replace it

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2003 Honda Civic Si Recalls

Honda Recalls 2003–2004 Vehicles Due to Defective Ignition Switch

Honda is recalling 2003 Accord and Civic, and 2003–2004 Element models due to a defective interlock lever in the ignition switch. The lever may deform, which will defeat the interlock function on vehicles with an automatic transmission. This may cause a vehicle that has not been shifted into the "Park" position to roll away, increasing the risk of a crash. Dealers will remove the interlock pin and lever and replace them with new components, free of charge.

Honda and Acura Recall Multiple Vehicles Due to Excessive Air Bag Inflator Pressure

Honda has recalled 2001-2003 Civic, 2002-2003 Civic SI, 2001-2002 Accord, 2002 CR-V, 2002 Odyssey, 2003 Pilot, 2002-2003 Acura TL, and 2003 Acura CL vehicles because the driver's side air bag inflator may produce excessive internal pressure. This could cause the inflator to rupture if the air bag deploys. Metal fragments may pass through the air bag material and cause injury to vehicle occupants. Dealers will replace the driver's side air bag inflator.

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