Autolite XP5684 Spark Plug

Overview of Autolite Iridium Spark Plug XP5684

The Autolite Iridium Spark Plug XP5684 is engineered for reliable ignition performance in select Lexus, Mitsubishi, Nissan, and Toyota vehicles. Designed with advanced materials and precise specifications, this spark plug supports efficient combustion and consistent engine operation.

• Iridium center electrode tip for enhanced durability and ignition
• Taper cut ground electrode with platinum tip for improved spark efficiency
• Copper core center electrode for optimal conductivity
• Resistor type with 4000 ohm resistance to reduce electrical noise
• Flat seat type with M12 - 1.25 thread size and 1.043 inch reach
• Pre-gapped to 0.044 inches (1.1 mm) for precise spark gap
• Ceramic insulator with 2.012 inch (51.1 mm) height for heat resistance
• Non-removable nut electrical terminal and 9/16 inch hex size for installation
• Performance grade type with manufacturer heat range 9
• Includes washer and skirt for secure fitment

Iridium Spark Plug Product Line Details

The Autolite Iridium Spark Plug line focuses on delivering consistent ignition performance through the use of iridium-tipped center electrodes. This design enhances electrode life and ignition reliability compared to conventional plugs. The XP5684 model incorporates these features with a fine wire center electrode and platinum ground electrode tip, balancing durability and efficient spark delivery for performance-oriented applications.

Technical Description and Features

The XP5684 spark plug features a copper core center electrode with an iridium tip, providing excellent electrical conductivity and wear resistance. The ground electrode is constructed from nickel with a platinum tip and a taper cut design, which helps optimize spark exposure and combustion efficiency. The ceramic insulator withstands high temperatures and electrical stress, while the resistor reduces electromagnetic interference. The spark plug’s flat seat and M12 - 1.25 thread size ensure compatibility with specified vehicle engines. Pre-gapped at 0.044 inches (1.1 mm), it supports precise ignition timing and combustion.

Compatible Vehicles and Applications

• Designed for use in Lexus models including ES250, ES300h, NX250, NX350h, NX450h+, RX350h, RX450h+, UX250h, UX300h, and Venza
• Compatible with Mitsubishi Outlander and Outlander PHEV
• Fits Nissan Altima, Sentra, Versa, and Versa Note
• Suitable for Toyota Avalon, Camry, Corolla, Corolla Cross, Crown Signia, Grand Highlander, Highlander, Prius, Prius AWD-e, Prius Prime, RAV4, RAV4 Prime, Rogue, and Sienna

Common Issues Addressed by XP5684 Spark Plug

• Misfiring or rough engine idle due to worn spark plugs
• Reduced fuel efficiency from incomplete combustion
• Difficulty starting the engine in cold conditions
• Engine hesitation or loss of power under acceleration
• Increased emissions caused by inefficient ignition

Installation Notes and Tips

Ensure the spark plug gap is verified before installation, although the XP5684 comes pre-gapped at 0.044 inches (1.1 mm). Use a 9/16 inch socket with a torque wrench to tighten to manufacturer specifications. The flat seat design requires proper seating to avoid compression leaks. Avoid over-tightening to prevent thread damage. The non-removable nut terminal simplifies electrical connection but requires careful handling during installation.

Quality Assurance and Warranty

Autolite manufactures the XP5684 spark plug to meet OEM standards for fit, form, and function. The use of iridium and platinum materials contributes to extended service life and consistent performance. While specific warranty details are not provided, Autolite products typically adhere to industry quality controls and reliability benchmarks.