Denso 3175 Spark Plug

Denso Double Platinum Spark Plug 3175

The Denso Double Platinum spark plug, part number 3175, is built for OE-level performance, durability, and emissions control. It is a direct-fit ignition component for select BMW and Dodge applications, including BMW 750iL, BMW 850Ci, and Dodge Avenger models listed below.

Key Features

• Double Platinum design with a platinum chip ground electrode tip
• Platinum center electrode tip with copper core for stable ignition performance
• Nickel ground electrode core material and standard ground configuration
• 5000 ohm resistance for ignition system compatibility
• Flat seat, 14.00 mm thread diameter, and 19.00 mm reach
• Pre-gapped to 0.8 for installation consistency
• Manufacturer heat range 16

Product Details

Denso Double Platinum 3175 is engineered to meet strict OE performance, durability, and emissions standards. The Double Platinum construction helps maintain consistent spark delivery under demanding operating conditions, while the copper-core center electrode supports efficient heat transfer. With a flat seat, 16.0 mm hex size, and standard ground configuration, this spark plug is specified for select import and domestic applications that call for this exact fitment. This part cross-references DENSO Auto Parts PKJ16CR8 for the same application.

Compatible With BMW 750iL and BMW 850Ci applications, as well as Dodge Avenger models from 2008-2014. The Denso 3175 is also listed for BMW 750iL 1995-1998 and BMW 850Ci 1995-1997, making it a relevant search match for drivers looking for a Denso Double Platinum spark plug 3175 replacement.

What It Helps Address

• Rough idle caused by worn spark plug electrodes
• Hard starting from weakened ignition output
• Misfire conditions related to plug wear or gap drift
• Reduced fuel economy from inconsistent combustion
• Emissions issues tied to degraded secondary ignition performance

Installation Notes

Verify thread diameter, reach, seat type, and heat range against the vehicle service specification before installation. Confirm the plug gap is set to 0.8 if your application requires final verification during service. Use proper torque procedures and inspect ignition coils, boots, and wires during replacement to avoid repeat misfire concerns.

Quality Assurance

Denso manufactures this Double Platinum spark plug to OE performance, durability, and emissions standards for consistent service life and dependable ignition performance.