Bosch HR7MPP302X Spark Plug

Overview of Bosch HR7MPP302X Spark Plug

The Bosch HR7MPP302X spark plug is engineered for reliable ignition performance in select Buick and Cadillac models. Designed with precision materials and specifications, this spark plug supports efficient combustion and consistent engine operation.

• Resistance: 6000 ohms for optimal electrical performance
• Center electrode tip made of platinum for durability
• Copper core ground electrode with standard tip design
• Pre-gap size of 1.1 mm for precise spark delivery
• Tapered seat type with 14 mm thread diameter and 25 mm reach
• Hex size of 16 mm for easy installation
• Manufacturer heat range rating of 7
• Ceramic non-projected insulator for heat resistance
• Designed for 4-cycle engines with resistor included

OE Fine Wire Platinum Product Line Details

The Bosch OE Fine Wire Platinum line focuses on spark plugs that combine fine wire platinum center electrodes with copper core ground electrodes. This design enhances ignition reliability and electrode longevity, making it suitable for vehicles requiring precise spark control. The HR7MPP302X spark plug benefits from this technology, providing consistent performance in Buick CTS, Cadillac SRX, STS, and Rendezvous models.

Technical Description and Features

The HR7MPP302X spark plug features a platinum center electrode tip that improves wear resistance and maintains a stable spark gap over time. The copper core ground electrode and nickel-yttrium materials in both electrodes contribute to efficient heat dissipation and electrical conductivity. With a resistance of 6000 ohms, this spark plug reduces radio frequency interference while supporting smooth ignition. The tapered seat and 25 mm reach ensure proper fitment and sealing in compatible engines. Its ceramic non-projected insulator withstands high temperatures and prevents misfires.

Compatible Vehicles and Common Applications

• Replacement spark plug for Buick CTS models
• Suitable for Cadillac SRX and STS vehicles
• Compatible with Buick Rendezvous ignition systems
• Designed for 4-cycle gasoline engines requiring a heat range 7 spark plug
• Addresses ignition misfires, rough idling, and poor fuel economy

Installation Notes and Tips

When installing the Bosch HR7MPP302X spark plug, ensure the engine is cool to avoid thread damage. Use a torque wrench to tighten the spark plug to manufacturer specifications, typically around 18-22 ft-lbs for tapered seat plugs. Verify the pre-gap size of 1.1 mm before installation, adjusting if necessary. The 16 mm hex size allows for standard spark plug socket use. Avoid over-tightening to prevent damage to the cylinder head.

Quality Assurance and Warranty

Bosch spark plugs, including the HR7MPP302X, are manufactured to meet OEM standards for fit, form, and function. The OE Fine Wire Platinum line undergoes rigorous testing to ensure durability and consistent ignition performance. While specific warranty details may vary, Bosch typically offers coverage against manufacturing defects. Refer to Bosch’s official documentation for exact warranty terms.