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Ignitions and Electrical› Ignition Components

NGK Laser

Laser Iridium Spark Plug

Name: Laser Iridium Spark Plug
Brand: NGK Laser
SKU: 12122455258

$32.50 $23.49 Save $9.01

SKU: 12122455258

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Overview

The NGK spark plug is a direct OEM replacement designed for a range of BMW engines, including the B46, B48, B58TU, and S58. This plug replaces BMW part numbers 12122455258 and 12125A4EF60.

Manufactured by NGK, the original supplier to BMW, this spark plug meets all original design, fitment, and performance requirements and is TUV approved. It is a cost-effective alternative to Original BMW parts, offering identical performance without the premium price tag. The plug features a M14x1.25 thread size, 28.5 mm thread reach, 16 mm hex size, and is pre-gapped to 0.032 inches.

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The NGK 12122455258 is a Genuine BMW/MINI "High Power" spark plug, featuring an iridium-tipped copper core for superior performance and longevity. This type of spark plug is engineered to last over 100,000 miles due to the exceptional wear resistance of iridium, providing a reliable spark for optimal engine combustion. It's a critical component for maintaining the smooth operation of your vehicle's engine. The spark plug's primary function is to ignite the compressed air-fuel mixture within the engine's cylinders. High voltage from the ignition coil arcs across the gap between the center and ground electrodes, creating the spark that initiates combustion. This process is essential for the engine to produce power and propel the vehicle. This NGK spark plug is designed for a wide range of BMW and MINI models, including various 2-Series, 3-Series, 4-Series, 5-Series, 7-Series, 8-Series, X1, X2, X3, X4, X5, X6, X7, and Z4 vehicles, as well as Cooper, Clubman, and Countryman models. It is specifically listed for engines such as the B46, B48, B58TU, and S58. Always verify fitment using the vehicle selection tool to ensure compatibility with your specific model year and configuration.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

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Specifications

Brand	NGK Laser
Part Number	12122455258
Category	Ignitions and Electrical

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Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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