NGK BMW S58 & B58TU Laser Iridium Spark Plug 95248

The NGK Laser Iridium Spark Plug is a premium ignition component engineered to deliver consistent performance, long service life and exceptional reliability for BMW S58 and B58TU engines. Designed with advanced electrode technology and high-quality materials, this spark plug ensures stable combustion, smooth idle and dependable ignition under demanding operating conditions, making it an ideal replacement or upgrade for modern high-output BMW engines.

Key Features

• Fine wire iridium-tipped centre electrode for superior ignitability

• Platinum-tipped ground electrode for reduced wear and long service life

• Copper core ground electrode to aid efficient heat removal

• Extended metal shell for improved heat dissipation

• Special gasket seat for secure sealing

• Trivalent metal plating for enhanced anti-corrosion and anti-seizing properties

• Corrugated ribs to prevent flashover

• Triple seal design to eliminate combustion gas leakage

Technical Specifications

• Thread Diameter: 12mm

• Thread Pitch: 1.25mm

• Seat Type: Gasket

• Reach: 28.5mm (1.12")

• Hex Size: 14mm Bi-Hex

• Terminal Type: Cup

• Spark Plug Gap: 0.8mm (.031")

• Heat Range: 8

• Resistor: Yes (5k Ohm)

• Longevity: Up to 100,000 miles

Electrode Design

Centre Electrode

• Material: Iridium

• Type: Fine wire

• Diameter: 1.0mm

• Projection: Non-projected

Ground Electrode

• Material: Platinum

• Type: Projected square

• Shape: Taper cut

Installation Information

• Torque (Cast Iron): 10.8–18 lb-ft

• Torque (Aluminium): 10.8–14.5 lb-ft

• Sold individually (quantity: 1 spark plug)

Professional installation is recommended to ensure correct torque settings and optimal performance.

Vehicle Compatibility

BMW engines equipped with:

• BMW S58

• BMW B58TU

Common applications include modern BMW M and performance models using these engines.

Why Choose NGK Laser Iridium?

NGK is globally recognised for its precision-engineered ignition components, supplying OEM and high-quality aftermarket solutions trusted by manufacturers and specialists alike. The Laser Iridium range combines advanced materials and manufacturing techniques to deliver dependable ignition performance and exceptional longevity.

Unless explicitly stated otherwise, all products sold by R44 Performance Limited are designated RACE ONLY and are solely for competition or off-road use limited to racing formally sanctioned by a recognized racing organization. Any other use, including recreational off-road use, may violate local, state, and Federal laws. R44 Performance Limited does not implicitly or explicitly confirm the legality of using any products it sells on public roads; that is entirely the responsibility of the consumer.

It is the responsibility of the customer to check with all federal, state local and environmental laws before ordering and installing a product. R44 Performance Limited is not responsible for any fees, fines or costs that a customer may incur as a result of failing to check with federal, state, local or environmental laws before ordering and installing a product.

We get a large number of custom orders and requests everyday, so as a result it is not always possible for us to keep every item in stock at all times in our warehouse. If you require the item urgently please contact our sales team here to check the stock before you make your purchase.

We totally understand if you're not certain a part will be compatible with your car, so we highly recommend contacting us here with your query. Our friendly sales team will then be in touch to confirm if this part is the correct part you are looking for.

All in stock products ship the same day if ordered before 2pm GMT

For out of stock items we will contact you with an estimated wait time if not otherwise specified above.

We offer worldwide shipping on all products. If upon receiving your product you wish to return; we offer a 30-day returns policy. For our in-depth returns information please follow the link. "R44 Returns Policy

All of our products come with a standard warranty of 1-3 years. This is dependant on the type of product however. For more details please see our warranty page here.