DENSO-IRL01-27(#5754)

The IRL01-27 spark plug is a high-performance ignition plug featuring an iridium centre electrode, built for strong, consistent sparks and dependable starting. A finer electrode needs less voltage to fire, which helps combustion efficiency, fuel economy and emissions performance.

Long-life electrode materials resist wear so the gap stays stable for longer. A quality ceramic insulator and plated shell help protect against fouling, heat and corrosion.

Specifications

• Part number: IRL01-27
• Stock reference: #5754
• Electrode: Iridium
• Heat range code: 01
• Sold as: single plug
• Condition: new

Fitment and installation

Confirm the part number against your vehicle's specification or the plugs currently fitted, paying attention to thread size, reach, hex size and heat range. Fit to a cool engine, thread the plug in by hand first to avoid cross-threading and tighten to the manufacturer's torque value. Fine-wire plugs are pre-gapped, so avoid levering the electrode. Replace plugs as a full set for an even engine balance.

Store spare parts in a cool, dry place in their original packaging until they are needed. Keeping a spare on the shelf is a sensible move for workshops, fleet operators and home mechanics who would rather not wait on parts. Pairing this part with a general inspection of the surrounding components is good practice, as related parts often wear at a similar rate. Stocked in New Zealand and dispatched quickly, so your vehicle spends less time off the road. Use the correct spark plug socket to protect the ceramic insulator during removal and fitting. Inspecting the old plugs as they come out can reveal useful clues about engine condition, such as oil consumption or a rich mixture. Every part is checked against its part number before dispatch, so what arrives matches what you ordered. Buying the correct part the first time saves on labour, avoids repeat jobs and gets the vehicle back to work sooner. Worn spark plugs can cause misfires, rough idle, hesitation and higher fuel consumption, so replacing them at the recommended interval keeps the engine running at its best. Our team is happy to answer questions about specifications, compatibility or ordering in larger quantities for fleet and workshop use.