NGK Spark Plugs · Part number ZFR5J-11 · NZ$21.00 incl. GST
For your trusty Honda Civic, Integra, or HR-V, spark plugs are the unsung heroes firing up your engine thousands of times a minute, and when they're knackered, you'll feel it with misfires, shocking fuel economy, and a real battle to start on those crisp Kiwi mornings.
NZ$21.00 including GST. Part number ZFR5J-11.
Spark Plug Swap: Keep Your Honda Humming Like a Happy Tui!
> Spark plugs are the little legends that create the spark to ignite your fuel-air mix, but after 30,000-100,000km, they wear down, leading to incomplete combustion. For those dependable Honda commuters like the Civic, Integra, Odyssey, and HR-V — the workhorses Kiwis lean on for everything from the school run to weekend getaways — worn plugs mean a rough idle, sluggish acceleration, and burning through your hard-earned fuel.
Symptoms That Led You Here
• Engine misfires or rough idle, especially when cold
• Noticeable drop in fuel economy (10-30% worse)
• Hesitation or stumbling during acceleration
• Difficulty starting, particularly on frosty mornings
• Check engine light with misfire codes (P0300-P0304)
• Failed emissions test due to incomplete combustion
Will it pass WOF?
Spark plugs themselves aren't a direct WOF inspection item, but the symptoms of worn plugs—excessive exhaust emissions and engine performance issues—can cause a WOF failure. NZ's visual smoke test will flag vehicles running rich due to misfiring cylinders.
DIY or Workshop?
Difficulty: 3/10 for most Honda 4-cylinders
Time: 30-60 minutes
Tools required: 10mm socket, spark plug socket (16mm or 5/8"), torque wrench, gap gauge, dielectric grease
Honda's inline-4 engines in the Civic, Integra, and HR-V have easily accessible plugs. The Odyssey's V6 requires removing the intake manifold for rear bank access—bump that to 6/10 difficulty.
Expert Recommendation
Bob and the CARFIX team recommend replacing spark plugs at manufacturer intervals (typically every 100,000km for iridium, 30,000km for copper) rather than waiting for symptoms. The NGK ZFR5J-11 is an excellent choice—NGK supplies original equipment to Honda, so you're getting factory-spec performance. Always replace as a complete set to maintain balanced combustion across cylinders.
Bob @ CARFIX is always on hand to help you work out exactly what spark plug suits your Honda's engine code and driving style. Make sure you head over to Bob's Shop for a chat!
Fitment Notes
• Confirm your specific Honda engine code before ordering—the D-series, B-series, and K-series use different plug specifications
• 1990s Civics and Integras may use a different heat range than 2000s models
• HR-V and Odyssey variants have different plug requirements depending on market (JDM vs NZDM)
• Always check and set electrode gap to manufacturer specification before installation
• Avoid over-torquing in aluminium heads—use a torque wrench
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🛠️ Bob's Pro Tip: Do the Job Right!
> If you're replacing this spark plug, make sure you've got the right workshop prep, protection, and safety gear ready. Taking a bit of extra time and using the proper safety stands and cleaners makes all the difference for a professional result!
🧰 What Else You'll Need:
• Safety First: Always secure your vehicle on heavy-duty safety jack stands before working underneath. Never rely solely on a hydraulic jack.
• Clean Hands: Keep a pack of Nitrile Gloves handy to protect your skin from grease, oils, and chemical sprays.
• Preparation: Have microfibre towels and a suitable parts cleaner nearby to keep components clean during installation.