Parts for your 2014 Mazda Cx-5-Spark plugs

2014 Mazda CX-5 Spark Plugs

Based on technical sources, spark plugs are used on 2014 Mazda CX-5 models fitted with SKYACTIV-G petrol engines (2.0L and 2.5L). The Mazda CX-5 2014 Owner’s Manual and Mazda Workshop Manual (Ignition System – SKYACTIV-G) specify long-life iridium spark plugs for these variants. By contrast, the 2.2L SKYACTIV-D diesel model uses glow plugs and does not use spark plugs. Major aftermarket catalogues from NGK and Denso also list iridium spark plugs for the petrol CX-5, further confirming fitment.

For owners of a 2014 Mazda CX-5 petrol, spark plugs do the crucial job of igniting the air–fuel mix, kicking off clean, efficient combustion. When they’re in top nick, the engine starts easily, idles smoothly, sips less fuel, and pulls strongly on the open road. Mazda fits long-life iridium plugs to the SKYACTIV-G motors, so they last a fair while, but they’re still a wear item and deserve a spot on the servicing checklist.

The typical replacement interval for these iridium plugs is around 120,000 kilometres (or about six years), as outlined in Mazda service schedules. That’s a guide, not gospel—short-trip driving, dusty conditions, or noticeable symptoms can bring the job forward. Classic signs they’re due include harder starting, rough idle, flat spots on acceleration, a drop in fuel economy, or a Check Engine light for misfire.

When it’s time, stick with quality OEM-equivalent iridium plugs. They’re designed for the heat range and combustion characteristics of the SKYACTIV-G. Iridium types usually come pre-gapped, avoid bending the fine-wire tip. Always install on a cool engine, use a proper spark plug socket, and torque to the Mazda workshop spec—over-tightening can damage threads, while under-tightening can cause poor heat transfer. Modern plugs are nickel- or zinc-plated, so anti-seize is generally not recommended unless the manufacturer explicitly calls for it.

It’s smart practice to replace all four plugs at once and inspect the coil-on-plug boots while you’re there. A thin film of dielectric grease on the inside of the boots can help prevent tracking. If the CX-5 spends most of its life doing school runs and short commutes, consider checking the plugs a bit earlier, as cooler, stop–start operation can age them faster. Done right, fresh plugs help the 2014 CX-5 run smoothly, keep emissions in check, and maintain that easy, efficient SKYACTIV feel across Aussie and Kiwi roads.

• Recommended interval: about 120,000 km (check your Mazda logbook).
• Use OEM-quality iridium plugs and the correct torque spec.
• Replace as a set, inspect coils and boots at the same time.

Popular questions about 2014 Mazda CX-5 spark plugs

How often should spark plugs be replaced on a 2014 Mazda CX-5 petrol?
Mazda specifies long-life iridium plugs for SKYACTIV-G engines, typically due at around 120,000 kilometres or roughly six years. If there’s rough running, misfires, hard starts, or a fuel economy hit, bring the job forward and have them checked or replaced sooner.

Does the 2014 CX-5 diesel have spark plugs?
No. The 2.2L SKYACTIV-D diesel uses compression ignition and glow plugs for cold starting, so it doesn’t have or need spark plugs. Any spark plug servicing applies to petrol (SKYACTIV-G) models only.

Which spark plugs are best for a 2014 CX-5 petrol?
Go for OEM-equivalent iridium plugs from Mazda, NGK, or Denso with the correct heat range for SKYACTIV-G. They’re built to handle the engine’s lean-burn strategy and high efficiency. Leave the factory set gap alone unless the workshop manual says otherwise, avoid anti-seize, and tighten to the specified torque.