Denso 3434 Spark Plug

Denso Iridium Long Life Spark Plug 3434

Denso 3434 is an Iridium Long Life spark plug built for OE-level performance, durability, and emissions control. It uses an iridium center electrode, platinum chip ground tip design, and a 0.9 mm pre-gap to support consistent ignition in demanding daily driving conditions.

Key Features

• Iridium center electrode tip material for stable spark performance
• Platinum chip ground electrode tip design for long service life
• Copper center electrode core and nickel ground electrode core
• 5000 ohm resistance for ignition system compatibility
• Flat seat design with 12.00 mm thread diameter and 19.00 mm reach
• 16.0 mm hex size for standard spark plug service tools
• Manufactured to OE performance, durability, and emissions standards

Product Details

The Denso Iridium Long Life line is engineered for drivers who want an OE-style spark plug with durable electrode materials and precise fitment characteristics. Part number 3434 is listed for 2017 Fiat 500, 2014-2016 Fiat 500, and 2013-2015 Chevrolet Spark applications, making it a direct replacement choice for those vehicles. This part cross-references DENSO Auto Parts SXU22PR9 for the same application.

What It Helps Address

• Hard starting caused by worn spark plug electrodes
• Misfire conditions related to weak or inconsistent spark output
• Rough idle from degraded ignition performance
• Reduced fuel efficiency from inefficient combustion
• Emissions issues tied to aging secondary ignition components

Installation Notes and Tips

Verify the specified thread diameter, reach, seat type, and pre-gap before installation. Use the correct 16.0 mm spark plug socket and follow the vehicle manufacturer’s torque specification. Inspect ignition coils, boots, and wiring during service to help confirm the root cause of any ignition complaint. For fitment, this spark plug is listed for 2017 Fiat 500, 2014-2016 Fiat 500, and 2013-2015 Chevrolet Spark.

Quality Assurance

Denso manufactures this spark plug to strict OE performance, durability, and emissions standards. The Iridium Long Life design reflects Denso’s focus on consistent ignition quality and long-term service in factory-specified applications.