A-Premium Iridium Platinum Spark Plugs Pack of 4 for L4 Nissan Engines — Fine-Wire, 12mm Thread

A-Premium Iridium Platinum spark plugs (pack of 4) are fine-wire, double-alloy ignition plugs engineered to fit a range of L4 Nissan and compatible vehicles, offering stable spark performance and long service life.

These A-Premium plugs combine an iridium-tipped center electrode with a platinum core to deliver consistent ignition, reliable starting and extended replacement intervals. Manufactured with a 0.044" pre-set gap and a 12 mm thread diameter, they match factory reach and geometry for many 4-cylinder Nissan engines and a handful of compatible makes. The plugs are resistance-type (5000 ohms) and come in a set of four—sized and spec'd to be a direct replacement where listed fitment applies.

Will these spark plugs fit my vehicle?

These plugs are listed for numerous L4 engines across Nissan models and compatible vehicles. Check the reference numbers and engine details against your owner's manual or existing plugs to confirm fitment.

• Reference numbers: 91187, LKAR6AIX-11, XP5684 and related cross-refs.
• Common Nissan fits: Altima (2007–2013), Rogue (2008–2015), Sentra (2007–2019), Versa/Versa Note (2007–2020), Cube, Frontier, Micra, NV200.
• Also compatible with Chevrolet City Express and Suzuki Equator where 12 mm thread and reach match.
• Pre-set gap: 0.044 inches; confirm engine requires this gap before installation.

How do the iridium and platinum materials help performance?

The combination of an iridium tip and a platinum core provides a durable, heat-resistant spark surface that preserves electrode geometry longer than standard copper plugs. This improves ignition consistency and reduces the frequency of replacements compared with conventional designs.

• Iridium center electrode for precise, long-lasting spark delivery.
• Platinum core supports electrode stability and wear resistance.
• Fine-wire design lowers the voltage required for consistent ignition.
• Resistance 5000 ohms to protect ignition systems and reduce interference.

What are the exact specifications and installation details?

Key dimensions and electrical specs are provided so you can confirm compatibility. The plug’s reach, hex size and insulator height match many OEM requirements for 4-cylinder engines listed in the fitment notes.

• Gap size: 0.044 inches (factory pre-set).
• Thread diameter: 12.00 mm; reach: 26.50 mm; insulator height: 51.00 mm.
• Hex size: 0.55 inches—use the correct socket for torque accuracy.
• Electrical resistance: 5000 ohms—compatible with most ignition coils and control modules.

How long can these spark plugs be expected to last?

A-Premium recommends replacing iridium/platinum spark plugs on a long service interval depending on driving conditions and manufacturer guidance. Regular inspection at service intervals will help maintain optimal ignition and fuel efficiency.

• Suggested replacement interval: 80,000–100,000 miles under normal driving.
• Inspect for fouling, deposits or electrode wear during tune-ups.
• Replace sooner if the engine shows misfires, rough idle, or hard starting.
• Always torque to the vehicle manufacturer’s specification at installation.

Who is this for: The A-Premium Iridium Platinum spark plugs pack of 4 is aimed at owners and technicians working on Nissan 4-cylinder models and compatible vehicles who want an affordable, longer-life replacement that preserves factory fitment and ignition performance. If your vehicle’s service manual lists any of the referenced part numbers or specifies a 12 mm, 26.5 mm reach plug with a 0.044" gap and resistance plug type, this set is a direct-fit option that balances durability and cost.