DENSO-ITV20TT(#4719)

This ITV20TT spark plug is engineered for modern petrol engines and features an iridium centre electrode with a fine-wire twin-tip design for a focused, stable spark. A finer electrode needs less voltage to fire, which helps combustion efficiency, fuel economy and emissions performance.

The insulator is designed to resist carbon fouling and flashover, while the corrosion-resistant shell and threads make installation and future removal easier. The plug is made to hold its gap over a long service life.

Specifications

• Part number: ITV20TT
• Stock reference: #4719
• Electrode: Iridium twin tip
• Heat range code: 20
• 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.

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. Workshops can order with confidence for customer vehicles, and private owners can tackle routine maintenance knowing the part is made to suit the job. Inspecting the old plugs as they come out can reveal useful clues about engine condition, such as oil consumption or a rich mixture. Our team is happy to answer questions about specifications, compatibility or ordering in larger quantities for fleet and workshop use. Every part is checked against its part number before dispatch, so what arrives matches what you ordered. Store spare parts in a cool, dry place in their original packaging until they are needed. Use the correct spark plug socket to protect the ceramic insulator during removal and fitting. Buying the correct part the first time saves on labour, avoids repeat jobs and gets the vehicle back to work sooner. Quality replacement parts like this help keep running costs predictable and reduce the chance of an unexpected roadside breakdown.