NGK Spark Plugs · Part number BUR9EQ · NZ$60.00 incl. GST
For your high-performance rotary engine like those found in the MAZDA RX-7 and COSMO, you'll want to know that spark plugs are the unsung heroes of smooth running.
NZ$60.00 including GST. Part number BUR9EQ.
Spark Plug Sorted — With NGK at the Heart
> Spark plugs are the little blighters responsible for igniting the fuel-air mix in your engine. Now, in a high-revving rotary like the MAZDA RX-7 and COSMO, they cop an absolute hammering with extreme heat and pressure. Over time, this wears them down, and that'll gut your performance and fuel economy.
Symptoms That Led You Here
• Rough as guts idling or misfires, especially noticeable in a rotary engine's unique setup.
• Feeling like you've lost some grunt and your acceleration's gone to custard.
• Your fuel bill's suddenly looking a bit scary.
• Struggling to get the engine to fire up.
• Hesitation or stumbling when you put your foot down.
Will it pass WOF?
Worn spark plugs themselves won't cause a WOF failure, but they can lead to increased emissions or engine misfires. That could mean a failed emissions test or point to bigger issues that'll stop you getting that WOF. Keep that ignition in tip-top shape for overall vehicle health.
DIY or Workshop?
Difficulty: 6/10 (for rotaries, access and torque are key)
Estimated Time: 1-2 hours
Tools Required: Spark plug socket (rotary specific), ratchet, torque wrench, spark plug gap tool, dielectric grease, basic hand tools.
🛠️ Bob's "Get It Done Right" Companion Checklist
• Safety First, Eh? Never get under your RX-7 supported only by a jack! Use proper axle stands. Those rotary engines are precious cargo.
• Cleanliness is Next to...: Before you even think about yanking out those old plugs, give the area a good clean with a brush and some compressed air. You don't want any crud falling into the cylinders.
• Spark Plug Socket: Make sure you have the right size spark plug socket. Using the wrong one can damage the plug or the threads in the head.
• Dielectric Grease: A wee dab of dielectric grease on the spark plug boot will help keep moisture out and ensure a good connection.
• Torque Wrench: Torque those plugs to the manufacturer's spec. Too tight and you risk damaging the threads; too loose and you'll get a misfire.
Expert Recommendation
Bob @ CARFIX reckons you should always swap out your spark plugs when the manufacturer says so, or when you spot those tell-tale signs of wear. Keep that engine purring like a kitten! NGK spark plugs, like SKU BUR9EQ, are a ripper choice for the MAZDA RX-7 and COSMO, known for their toughness and reliable spark. Bob @ CARFIX is always here to help you work out exactly what part you need for your MAZDA RX-7 or COSMO. Make sure you head over to Bob's Shop for a chat!
Fitment Notes
This spark plug is made for various MAZDA RX-7 and COSMO models from '85 to '02, including naturally aspirated, Turbo, and Twin Turbo versions. Always double-check your vehicle's year, model, and engine type against the product specs to make sure you get the right fit, especially with the rotary engine's quirks.
Bob's your uncle!
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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.