NGK Laser Iridium Spark Plug for BMW S58 & B58TU Engines
The NGK Laser Iridium Spark Plug is a premium ignition component engineered to deliver exceptional reliability, consistent performance, and extended service life for BMW S58 and B58TU engines. Manufactured using advanced electrode technology and high-quality materials, this spark plug provides stable combustion, smooth engine operation, and dependable ignition under demanding driving conditions.
Whether you're carrying out routine maintenance, replacing worn factory spark plugs, or supporting a tuned performance application, NGK Laser Iridium spark plugs offer the precision and durability trusted by OEM manufacturers and performance specialists worldwide.
Key Features
- Fine-wire iridium-tipped centre electrode for superior ignitability
- Platinum-tipped ground electrode for reduced wear and extended service life
- Copper core ground electrode for efficient heat transfer
- Extended metal shell for improved heat dissipation
- Special gasket seat for secure sealing
- Trivalent metal plating for enhanced corrosion and anti-seize protection
- Corrugated ribs to prevent electrical flashover
- Triple seal construction to eliminate combustion gas leakage
- Designed for high-performance BMW turbocharged engines
- Long service life of up to 100,000 miles
Technical Specifications
| Specification |
Details |
| 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 (0.031") |
| Heat Range |
8 |
| Resistor |
Yes (5k Ohm) |
| Service Life |
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
The combination of an iridium centre electrode and platinum ground electrode delivers exceptional ignition efficiency while minimising wear over extended service intervals.
Installation Information
- Torque Specification (Cast Iron Cylinder Head): 10.8–18 lb-ft
- Torque Specification (Aluminium Cylinder Head): 10.8–14.5 lb-ft
- Quantity Supplied: 1 Spark Plug
Professional installation is recommended to ensure correct torque settings, proper plug gap verification, and optimal engine performance.
Vehicle Compatibility
Compatible with BMW vehicles equipped with the following engines:
BMW S58
Commonly found in:
- BMW G80 M3
- BMW G81 M3 Touring
- BMW G82 M4
- BMW G83 M4
- BMW G87 M2
- BMW XM
- Other BMW M models equipped with the S58 engine
BMW B58TU
Commonly found in:
- BMW M340i
- BMW M440i
- BMW M240i
- BMW X3 M40i
- BMW X4 M40i
- BMW X5 40i
- BMW X7 40i
- Toyota GR Supra (B58 applications)
- Other BMW models equipped with the latest-generation B58TU engine
If you are unsure whether this spark plug is suitable for your vehicle, our team can confirm compatibility before purchase.
Why Choose NGK Laser Iridium?
NGK is globally recognised as one of the world's leading ignition component manufacturers, supplying OEM and high-performance spark plugs for some of the most demanding automotive applications.
Benefits of NGK Laser Iridium technology include:
- Superior ignition performance
- Improved combustion efficiency
- Excellent resistance to wear
- Consistent spark quality throughout service life
- Enhanced reliability under high boost and high load conditions
- Extended maintenance intervals
- Trusted OEM-quality manufacturing
Why Buy from RCW Performance?
At RCW Performance, we supply premium BMW maintenance and performance components trusted by enthusiasts and professional workshops alike.
When you purchase from RCW Performance, you benefit from:
- Genuine, high-quality performance components
- BMW-specific technical expertise
- Fast UK and international shipping
- Trusted fitment guidance
- Dedicated customer support
- Carefully selected products from leading brands
Whether you're maintaining a factory BMW or supporting a high-performance build, the NGK Laser Iridium Spark Plug delivers the reliability, longevity, and ignition performance your S58 or B58TU engine demands.
