Denso 5346 Spark Plug

Denso Iridium Power Spark Plug 5346

Denso Iridium Power spark plug 5346 is built for precise ignition performance in select Audi applications. It uses a 0.4 mm iridium center electrode, a copper core, and a tapered-cut U-groove ground electrode design to support consistent spark delivery and efficient combustion.

The Iridium Power line focuses on compact electrode geometry and stable electrical performance for drivers who want OE-style fitment with performance-oriented plug construction. This part number 5346 is a direct match for select Audi A8 Quattro, RS7, S6, S8, and TT RS Quattro applications listed below.

Key Features

• Iridium center electrode with 0.4 mm tip for fine-wire ignition performance
• Tapercut, U-groove ground electrode design
• Copper core center electrode for heat transfer support
• Nickel ground electrode core material
• 5000 ohm resistance
• 14.00 mm thread diameter, 26.50 mm reach, and flat seat type
• Pre-gapped to 0.8 mm
• 16.0 mm hex size for service access

Detailed Description

Denso 5346 is an Iridium Power spark plug engineered around a small-diameter iridium center electrode and a shaped ground electrode to promote reliable spark initiation. The manufacturer heat range is 24, and the plug’s 5000 ohm resistance supports stable ignition system operation in the specified Audi fitments. If you are searching for a Denso Iridium Power spark plug for Audi A8 Quattro, RS7, S6, S8, or TT RS Quattro, this part number 5346 matches the applications shown in the fitment data.

This part cross-references DENSO Auto Parts IKH24 and Volkswagen 079 905 626 E for the same application.

What It Helps Address

• Misfire conditions caused by worn or eroded spark plug electrodes
• Hard starting related to weak ignition spark
• Rough idle from inconsistent combustion
• Reduced throttle response from degraded plug performance
• Service replacement needs on select Audi ignition systems

Installation Notes and Tips

• Verify the vehicle application before installation using the listed Audi fitment data.
• Check the pre-gap specification against the engine requirement before installing Denso 5346.
• Inspect ignition coils and plug wells for wear, oil, or carbon buildup during service.
• Use the correct 16.0 mm spark plug socket and follow the manufacturer torque specification for the engine.

Quality Assurance

Denso Iridium Power plugs are built to OE-level dimensional standards with performance-focused electrode design. This part number 5346 is specified for select 2013-2016 Audi A8 Quattro, 2014-2016 Audi RS7, 2013-2016 Audi S6, 2013-2016 Audi S8, and 2013 Audi TT RS Quattro applications.