Denso 3175 Spark Plug

Overview of Denso Double Platinum Spark Plug 3175

The Denso Double Platinum Spark Plug 3175 is engineered for reliable ignition performance in select BMW and Dodge vehicles. Designed with advanced materials and precise specifications, this spark plug supports efficient combustion and consistent engine operation.

• Part Number: 3175
• Compatible with BMW 750iL, 850Ci and Dodge Avenger
• Double Platinum electrodes for enhanced durability
• Center electrode core made of copper for optimal conductivity
• Ground electrode tip features a platinum chip
• Standard ground configuration with nickel core material
• Pre-gap size of 0.8 mm for precise spark delivery
• Flat seat type with 14 mm thread diameter and 19 mm reach
• Hex size of 16 mm for installation
• Manufacturer heat range rating of 16

Detailed Features and Specifications

This Denso spark plug incorporates a copper core center electrode with a platinum tip, which improves electrical conductivity and wear resistance. The ground electrode uses a nickel core with a platinum chip tip, providing stable spark performance and extended service life. The single ground electrode design and standard ground configuration ensure compatibility with the ignition systems of BMW 750iL, 850Ci, and Dodge Avenger models. The pre-gap size of 0.8 mm is factory set to optimize ignition timing and combustion efficiency. The flat seat design and 14 mm thread diameter allow for secure installation, while the 19 mm reach ensures proper fitment within the combustion chamber.

About the Double Platinum Product Line

The Double Platinum line from Denso features spark plugs with platinum on both the center and ground electrodes. This dual platinum design enhances durability and ignition stability compared to conventional plugs. The 3175 spark plug benefits from this technology by offering consistent performance and longer service intervals, making it suitable for vehicles requiring precise ignition components such as the BMW 750iL, 850Ci, and Dodge Avenger.

Applications and Common Issues Addressed

• Replacement for worn or fouled spark plugs in BMW 750iL, 850Ci, and Dodge Avenger
• Helps resolve engine misfires and rough idling
• Improves cold start performance and throttle response
• Reduces spark plug wear and electrode erosion
• Supports stable combustion to lower emissions

Installation Notes and Tips

• Verify compatibility with your vehicle’s make and model before installation
• Use a torque wrench to tighten the spark plug to manufacturer specifications
• Check and adjust the spark plug gap if necessary, though pre-gap is factory set at 0.8 mm
• Inspect the spark plug threads and seat for damage before installation
• Replace spark plugs in sets to maintain engine balance

Quality Assurance and Warranty

Denso spark plugs are manufactured to meet strict quality standards and undergo rigorous testing to ensure reliable performance. The Double Platinum 3175 spark plug is designed for durability and consistent ignition. Warranty coverage details should be confirmed with the original equipment manufacturer or authorized distributor.