Bosch YR7MPP33 Spark Plug

Overview of Bosch OE Fine Wire Double Platinum Spark Plug YR7MPP33

The Bosch OE Fine Wire Double Platinum spark plug YR7MPP33 is engineered for reliable ignition performance in select Dodge and Mercedes-Benz vehicles. Designed with durable platinum electrodes and a ceramic insulator, this spark plug supports efficient combustion and consistent engine operation.

• Double platinum electrodes for extended durability
• 6000 ohm resistor to reduce electrical interference
• Standard ground electrode tip and configuration
• Flat seat type with 26.5 mm reach and 12 mm thread diameter
• Pre-gapped to 0.8 mm for optimal ignition
• Hex size 16 mm for easy installation
• Manufacturer heat range 7 for balanced thermal performance
• Ceramic non-projected insulator for reliable insulation

Detailed Product Features and Specifications

The Bosch OE Fine Wire Double Platinum spark plug YR7MPP33 features a center electrode made of platinum with a nickel-yttrium and copper core, enhancing conductivity and wear resistance. The ground electrode tip is also platinum combined with nickel-yttrium, providing consistent spark gap stability. This spark plug includes a 6000 ohm resistor to minimize radio frequency interference, ensuring smooth operation of vehicle electronics. Its flat seat design and 26.5 mm reach make it compatible with specific ignition systems requiring precise fitment. The pre-gap size of 0.8 mm is factory set to optimize ignition timing and combustion efficiency.

About the OE Fine Wire Double Platinum Product Line

The OE Fine Wire Double Platinum line from Bosch is designed to meet original equipment specifications with enhanced electrode materials. This product line uses fine wire platinum electrodes on both the center and ground electrodes, which improves wear resistance and ignition reliability compared to conventional spark plugs. The double platinum design helps maintain a stable spark gap over time, reducing the need for frequent replacements and supporting consistent engine performance in vehicles like the Mercedes-Benz C-Class and Dodge models.

Compatible Vehicles and Common Applications

• Mercedes-Benz C230, C250, C280, C300, C350
• Mercedes-Benz CL550, CLK350, E280, E300, E350
• Mercedes-Benz G550, GL550, GLK350, ML350, ML450, ML550
• Mercedes-Benz R350, R550, S400, S450, S550, SL550, SLK280, SLK300, SLK350
• Mercedes-Benz Sprinter 2500 and Sprinter 3500
• Dodge models compatible with 4-cycle spark plugs requiring this specification

Common Issues Addressed by Bosch YR7MPP33 Spark Plug

• Engine misfires due to worn or fouled spark plugs
• Reduced fuel efficiency from inconsistent ignition
• Difficulty starting the engine in cold conditions
• Rough idling or hesitation during acceleration
• Interference with vehicle electronics caused by spark plug noise

Installation Notes and Tips

Ensure the spark plug gap is set to the factory pre-gap of 0.8 mm before installation. Use a 16 mm socket wrench for proper torque application. Verify the flat seat type matches the engine’s cylinder head design to prevent compression leaks. Avoid over-tightening to protect the thread diameter of 12 mm and prevent damage. It is recommended to replace all spark plugs simultaneously to maintain balanced engine performance.

Quality Assurance and Warranty

Bosch OE Fine Wire Double Platinum spark plugs are manufactured to meet strict OEM standards for fit, form, and function. The use of high-quality materials such as platinum electrodes and ceramic insulators ensures durability and consistent performance. While specific warranty details may vary, Bosch typically offers coverage against manufacturing defects, supporting reliability for your ignition system.