NGK Laser Iridium Spark Plug for Volvo S80 and XC90 (2005–2011)

The NGK 5368 Laser Iridium spark plug, type IFR6B11, ignites the air-fuel mixture in 2007–2010 Volvo S80 and 2005–2011 Volvo XC90 engines. It pairs an iridium center electrode with a single ground electrode and has a built-in 5 kOhm interference suppression resistor. The terminal is a fixed SAE connector, and the threaded section is 19 mm long. NGK rates this plug as OE quality, and it is made in Japan.

This NGK spark plug carries a 24-month or 24,000-mile warranty.

Volvo's part number for this plug is 30731383. NGK also identifies it as IFR6J11 and 7658, so a plug marked with either of those codes or IFR6B11 is the same item. A resistor in the plug suppresses electrical noise from the spark that could otherwise disturb radios and onboard electronics.

Technical Details

• Manufacturer: NGK; part number 5368, NGK type IFR6B11
• Also identified as NGK IFR6J11 and 7658
• Volvo part number: 30731383
• Electrodes: iridium center electrode, one ground electrode
• Thread length 19 mm; 16 mm socket size
• Fixed SAE terminal; 5 kOhm suppression resistor
• Made in Japan
• Warranty: 24 months or 24,000 miles

Installation & Tuning Notes

Tighten to 28 Nm with a 16 mm plug socket. Skip anti-seize on the threads. A thin coat of dielectric grease on the ignition connector and ceramic insulator is recommended instead.

Common Questions

Should anti-seize go on these plugs?
No. Install them with clean threads and put a thin coat of dielectric grease on the connector and insulator only.

How do I know my plugs are due?
Misfiring, a check engine light, hesitation, loss of power, and poor fuel economy are typical signs. Replace them at Volvo's suggested service interval.

PMB sells NGK ignition parts for European vehicles, this Volvo plug included.

Fitment & Compatibility

Use the fitment table below to confirm your Volvo is covered. Send PMB your VIN and we will check fit before you order.