NGK Iridium Spark Plug ILZKBR7B-8DG for Mini Cooper, Cooper Countryman, and Cooper Paceman (2007–2016)

Pre-gapped and ready to install, the NGK 97968 iridium spark plug (designation ILZKBR7B-8DG) is the factory-replacement plug for the Mini Cooper, Cooper Countryman, and Cooper Paceman models shown in the fitment table. The center electrode has a copper core with an iridium tip, and the single standard ground electrode also has a copper core. It has a 12 x 1.25 mm thread, a 26.5 mm reach, and a flat seat. The plug comes gapped at 0.030 in (0.762 mm), carries a 5,000-ohm resistor, and has a non-removable terminal nut. NGK rates it at heat range 7 and builds it in Japan.

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

The hex is the detail most buyers miss. This plug uses a 14 mm bi-hex, or 12-point, shape instead of a standard six-point hex, so a regular spark plug socket will not fit it properly. The 97968 cross-references to OE number 12120035531. NGK also associates it with stock numbers 5992, 95770, and 90223 and with the related designation ILZKBR7B-8G. As the plug fires, the electrode wears and the gap grows, which is why an old plug behaves much like one that was gapped wrong.

Technical Details

• Manufacturer: NGK, a brand of Niterra Co., Ltd.
• NGK part number: 97968 (designation ILZKBR7B-8DG)
• Thread: 12 x 1.25 mm, 26.5 mm reach, flat seat
• Hex: 14 mm bi-hex (12-point)
• Center electrode: copper core, iridium tip
• Ground electrode: one, copper core, standard design
• Gap: 0.030 in (0.762 mm), pre-set
• Resistance: 5,000 ohms
• Heat range: 7
• Insulator height: 51 mm
• Made in Japan
• Warranty: 24 months or 24,000 miles

Installation & Tuning Notes

Use a 14 mm 12-point spark plug socket. Tighten to 23 ± 3 Nm (about 17 ft-lb). The gap is set at the factory, so the plug goes in as supplied.

Common Questions

Can I use my regular spark plug socket?
Not usually. The 14 mm bi-hex needs a matching 12-point socket.

Why replace plugs that still fire?
The electrode wears with use and the gap widens, which leads to hesitation, misfires, and lost fuel economy.

PMB Performance carries NGK plugs for turbocharged Mini owners who want the correct part the first time.

Fitment & Compatibility

Check the fitment table below for the Mini models, years, and trims this plug fits. Confirm your engine before ordering. Send us your VIN and we will verify the fit.