NGK 94158 Spark Plug
OE Quality 60-Day Returns
NGK
 Laser Iridium High Ignitability Spark Plug

NGK 94158 Spark Plug

Brand NGK 94158
Resistance 5000.0
Ground Electrode Tip Design Dual fine electrode (dfe) - high ignitability
Ground Configuration J-gap
11589 Metric
Ground Electrode Core Material Copper
Washer Included Yes
Grade Type Performance
Electrical Terminal Type Non-removable nut
Center Electrode Core Material Copper
Center Electrode Tip Material Iridium
Pre-Gap Size .036
Pre-Gap Size 0.9
Ground Electrode Quantity 1
Hex Size 14mm
Insulator Height 2.01
Insulator Height 51.0
Manufacturer Heat Range 7
Seat Type Flat
Reach 1.122
Reach 28.5
Insulator Material Ceramic
Resistor Type Yes
Skirt Length 0.0
Thread Size M12 - 1.25
Ground Electrode Tip Material Platinum
Skirt No
Center Electrode Insulator Tip Projection 0.16
Center Electrode Insulator Tip Projection 4.0
Center Electrode Design Fine wire
9745 Crush
Product line Laser Iridium High Ignitability Spark Plug
Fits INFINITI and Nissan · 15 vehicles

OE application ready. Engineered for original-equipment use and tested to strict quality standards.

Iridium center electrode. Fine-wire design helps deliver durable, reliable spark performance.

Copper core construction. Helps control heat for dependable starts and consistent operation.

Cross-references NGK 94158 and DILKAR7N9HG for the same application. See all 2.

$24.75Free shipping
In stock · usually ships same day before 1pm CST
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Order total $24.75
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Free returns within 60 days if it doesn't fit when fitment is verified.
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NGK Laser Iridium Spark Plug for OE Fitment

NGK 94158 is a Laser Iridium High Ignitability spark plug built for OE-style service on select Infiniti and Nissan engines. It uses an iridium center electrode, platinum ground tip, and a copper core design to support reliable starting, stable ignition, and long service life.

Key Features

  • Laser Iridium High Ignitability design for OE applications
  • Iridium center electrode for durable spark performance
  • Platinum ground electrode tip for even wear in distributorless ignition systems
  • Fine-wire center electrode for consistent ignition response
  • Copper core construction helps control heat
  • Flat seat, M12 x 1.25 thread, 14mm hex, and 0.036 in. pre-gap
  • Resistor spark plug with 5000 ohm resistance

Product Details

This NGK Laser Iridium High Ignitability spark plug is engineered to match OE requirements for vehicles that call for a high-ignitability plug. The iridium tipped center electrode is built for durability, while the platinum ground electrode tip helps promote even wear and steady spark performance. NGK 94158 also uses high-grade ceramic insulation and a copper core to help manage heat and support dependable operation under daily driving conditions. This part cross-references DILKAR7N9HG for the same application.

Compatible With 2019-2024 Nissan Altima, N/A; 2019-2024 Infiniti QX50, N/A; and 2022-2024 Infiniti QX55, N/A. It also fits 2019 Infiniti QX50, N/A with the OE high-ignitability service requirement. For buyers searching for an Infiniti QX50 spark plug, Nissan Altima spark plug, or Infiniti QX55 OE replacement, NGK 94158 is the direct service part to review.

What It Helps Address

  • Hard starting caused by worn spark plug electrodes
  • Misfire conditions related to weak ignition output
  • Rough idle from inconsistent spark delivery
  • Reduced throttle response from degraded plug performance
  • Heat-related plug wear in OE ignition systems

Installation Notes and Tips

Verify the engine calls for a high-ignitability Laser Iridium plug before installation. Check the pre-gap specification, thread size, reach, seat type, and heat range against the vehicle service information. Use proper spark plug service procedures to avoid thread damage and ensure correct torque during installation. NGK 94158 is listed for select 2019-2024 Nissan Altima, 2019-2024 Infiniti QX50, and 2022-2024 Infiniti QX55 applications.

Quality Assurance

NGK states that this Laser Iridium High Ignitability spark plug is tested to high standards for quality and durability and is engineered for OE applications. The design combines iridium, platinum, ceramic insulation, and copper-core construction to support consistent service performance.

Related reading

This part fits 15 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelLitersCylindersNotes
2024INFINITIQX502.0LL4Actual OE Manufacturer; OE Spark Plug Is High Ignitability. For Optimal Performance, Replace With High Ignitability Spark Plugs.; Laser Iridium High Ignitability Spark Plug
2024INFINITIQX552.0LL4Actual OE Manufacturer; OE Spark Plug Is High Ignitability. For Optimal Performance, Replace With High Ignitability Spark Plugs.; Laser Iridium High Ignitability Spark Plug
2024NissanAltima2.0LL4Actual OE Manufacturer; OE Spark Plug Is High Ignitability. For Optimal Performance, Replace With High Ignitability Spark Plugs.; Laser Iridium High Ignitability Spark Plug
2023INFINITIQX502.0LL4Actual OE Manufacturer; OE Spark Plug Is High Ignitability. For Optimal Performance, Replace With High Ignitability Spark Plugs.; Laser Iridium High Ignitability Spark Plug
2023INFINITIQX552.0LL4Actual OE Manufacturer; OE Spark Plug Is High Ignitability. For Optimal Performance, Replace With High Ignitability Spark Plugs.; Laser Iridium High Ignitability Spark Plug
2023NissanAltima2.0LL4Actual OE Manufacturer; OE Spark Plug Is High Ignitability. For Optimal Performance, Replace With High Ignitability Spark Plugs.; Laser Iridium High Ignitability Spark Plug
2022INFINITIQX502.0LL4Actual OE Manufacturer; OE Spark Plug Is High Ignitability. For Optimal Performance, Replace With High Ignitability Spark Plugs.; Laser Iridium High Ignitability Spark Plug
2022INFINITIQX552.0LL4Actual OE Manufacturer; OE Spark Plug Is High Ignitability. For Optimal Performance, Replace With High Ignitability Spark Plugs.; Laser Iridium High Ignitability Spark Plug
2022NissanAltima2.0LL4Actual OE Manufacturer; OE Spark Plug Is High Ignitability. For Optimal Performance, Replace With High Ignitability Spark Plugs.; Laser Iridium High Ignitability Spark Plug
2021INFINITIQX502.0LL4Actual OE Manufacturer; OE Spark Plug Is High Ignitability. For Optimal Performance, Replace With High Ignitability Spark Plugs.; Laser Iridium High Ignitability Spark Plug
2021NissanAltima2.0LL4Actual OE Manufacturer; OE Spark Plug Is High Ignitability. For Optimal Performance, Replace With High Ignitability Spark Plugs.; Laser Iridium High Ignitability Spark Plug
2020INFINITIQX502.0LL4Actual OE Manufacturer; OE Spark Plug Is High Ignitability. For Optimal Performance, Replace With High Ignitability Spark Plugs.; Laser Iridium High Ignitability Spark Plug
2020NissanAltima2.0LL4Actual OE Manufacturer; OE Spark Plug Is High Ignitability. For Optimal Performance, Replace With High Ignitability Spark Plugs.; Laser Iridium High Ignitability Spark Plug
2019INFINITIQX502.0LL4105,000 mi OE Mfr Recommended Service Interval; Laser Iridium High Ignitability Spark Plug
2019NissanAltima2.0LL4Actual OE Manufacturer; OE Spark Plug Is High Ignitability. For Optimal Performance, Replace With High Ignitability Spark Plugs.; Laser Iridium High Ignitability Spark Plug
Directly replaces or cross-references 2 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
NGK — 94158DILKAR7N9HG