Denso 3476 Spark Plug

Denso Iridium Long Life Spark Plug for Honda CR-Z

The Denso 3476 spark plug is built for Honda CR-Z applications that call for an OE-style ignition component with long service life and stable performance. It combines an iridium center electrode with a platinum needle ground design to support consistent spark delivery and reliable combustion.

Compatible with 2011-2016 Honda CR-Z models, this Denso Iridium Long Life (SIP) spark plug is engineered to meet strict OE performance, durability, and emissions standards. The Denso 3476 is a direct-fit ignition service part for drivers maintaining factory-style operation in the Honda CR-Z.

Key Features

• Denso part number 3476 for Honda CR-Z ignition service
• Iridium center electrode tip for durable spark performance
• Platinum needle ground electrode tip design
• Needle-to-needle ground configuration
• Copper center and ground electrode core materials
• Pre-gapped at 1.3 mm
• 5000 ohm resistance
• Flat seat, 14.00 mm thread diameter, 19.00 mm reach, 16.0 mm hex size

Product Line Details

Denso Iridium Long Life (SIP) spark plugs are part of Denso’s long-life ignition line for OE-style replacement needs. This product line uses iridium at the center electrode and a fine-tip ground design to support dependable ignition performance over extended service intervals while maintaining factory-fit dimensions.

Detailed Description

The Denso 3476 is manufactured to align with OE performance, durability, and emissions expectations. Its iridium center electrode tip helps maintain a stable spark, while the platinum needle ground electrode design supports efficient ignition under everyday driving conditions. With a flat seat and OE-style dimensions, it is built for direct replacement service in Honda CR-Z models from 2011 through 2016. This part cross-references DENSO Auto Parts DK20PR-D13 for the same application.

Common Issues This Part Can Address

• Rough idle caused by worn spark plug electrodes
• Hard starting from weakened ignition output
• Misfire conditions related to spark plug wear
• Reduced fuel economy from inconsistent combustion
• Loss of throttle response from degraded ignition performance

Installation Notes and Tips

Verify engine code and service specifications before installation. Check the plug gap against the vehicle service information even though the plug is pre-gapped at 1.3 mm. Use the correct torque procedure for the flat-seat design and inspect ignition coils, boots, and wiring during service. Fits 2011-2012 Honda CR-Z, N/A. Fits 2013-2014 Honda CR-Z, N/A. Fits 2015-2016 Honda CR-Z, N/A.

Quality Assurance

Denso manufactures this spark plug to strict OE performance, durability, and emissions standards. The Denso 3476 is built as an OE-style replacement for Honda CR-Z ignition service and is backed by Denso’s manufacturing standards for consistent fit and function.