The 2004 Honda CR-V uses four spark plugs—one for each cylinder—on its 2.4-liter inline-four engine. The ignition system typically employs coil-on-plug coils, so you’ll see four ignition coils as well.
Engine layout and spark plug count
In the 2004 CR-V, Honda's 2.4-liter engine is a four-cylinder design. Because there are four cylinders, there are four spark plugs, with each plug paired to its own ignition coil in a coil-on-plug setup. This configuration simplifies timing and replacement, and is common in late-model Hondas.
Maintenance considerations
If you’re planning to replace spark plugs, here is a standard approach for the 2004 CR-V’s 2.4L engine. Note that you should always consult the owner's manual or a service manual for the exact torque and heat-range specifications for your vehicle.
- Prepare the right parts and tools: four spark plugs of the correct heat range for the engine, a spark plug socket (usually 5/8 inch / 16 mm), a ratchet, extensions, a torque wrench, and a screwdriver/ratchet set as needed to access the coils.
- Disconnect the negative battery terminal (optional but recommended for safety) and unplug the electrical connectors from each ignition coil.
- Remove each ignition coil and access its spark plug. Use the spark plug socket to loosen and remove the old plug.
- Inspect the old plugs for wear and gap, then install new plugs by threading them by hand first and tightening to the manufacturer’s torque specification. Reinstall the ignition coils and connect the electrical harnesses.
- Reconnect the battery if disconnected, start the engine, and check for smooth operation and any signs of misfire. If misfires occur, recheck plug seating and torque.
Regular inspection of plug wires/coils for wear and replacing plugs at the recommended interval helps maintain fuel efficiency and performance for the CR-V's 2.4L engine.
Market variations and engine notes
For the 2004 CR-V, all US-market models with the 2.4-liter engine use four spark plugs, one for each cylinder. Some international markets or earlier/later trims may have different engine options, but the four-plug layout remains standard for the common 2.4L CR-V of this year. Always verify with your specific VIN or engine code if you are dealing with a non-U.S. model or a different market configuration.
Additional considerations
If you’re unsure about the exact heat range or torque specification for your vehicle, consult Honda's service information or a trusted repair manual (e.g., Honda Factory Service Manual, Chilton, or Haynes) to avoid over-tightening or using the wrong spark plug type.
Summary
The 2004 Honda CR-V uses four spark plugs—one per cylinder—on its 2.4-liter inline-four engine. Maintenance involves replacing all four plugs with the correct part, along with checking ignition coils and related connections. Always follow factory torque specs and refer to the manual for your exact model.