Champion 7429 Spark Plug

Reliable Ignition Performance for BMW, Mercedes-Benz, and Rolls-Royce

The Champion Double Platinum Power 7429 spark plug is engineered to deliver consistent ignition and efficient combustion for select BMW, Mercedes-Benz, and Rolls-Royce models. Designed with durable platinum electrodes and a precise pre-gap, this spark plug supports optimal engine performance and fuel efficiency.

• Double platinum center and ground electrode tips for enhanced durability
• J gap ground electrode tip design for stable spark delivery
• Non-removable nut electrical terminal type for secure connection
• Flat seat type ensuring proper fit and sealing
• Resistor type spark plug to reduce electrical interference
• Manufacturer heat range rating of 5 for balanced thermal performance
• Bi-hex 14mm hex size for easy installation and removal
• Reach length of 1.08 inches for correct combustion chamber positioning

About the Double Platinum Power Product Line

The Double Platinum Power line from Champion features spark plugs with platinum on both the center and ground electrodes, providing longer service life and consistent spark performance compared to conventional plugs. This design helps maintain ignition reliability under demanding driving conditions, making it suitable for premium vehicles such as BMW 3 Series and Mercedes-Benz E-Class models.

Technical Details and Specifications

The Champion 7429 spark plug incorporates a platinum center electrode tip and a platinum ground electrode core with a J gap design, which promotes stable and efficient spark generation. The pre-gap size is precisely set at 0.032 inches (0.8 mm) to optimize ignition timing and combustion. Featuring a flat seat type and a heat range of 5, this spark plug balances heat dissipation and prevents fouling. The resistor built into the plug reduces radio frequency interference, protecting sensitive vehicle electronics. The bi-hex 14mm hex size allows for straightforward installation using standard tools.

Compatible Vehicles and Applications

• Designed for BMW models including 135i, 228i, 320i, 328i, 335i, 428i, 528i, 535i, 550i, 650i, 750i, and Z4
• Compatible with Mercedes-Benz models such as E300, GLE63 AMG, GLS63 AMG, GLK350, ML550, and R350
• Suitable for Rolls-Royce models including Dawn, Ghost, and Wraith
• Ideal for vehicles requiring a spark plug with a 1.08-inch reach and flat seat
• Addresses ignition issues related to misfires, rough idling, poor fuel economy, and hard starts

Installation Notes and Tips

Ensure the engine is cool before removing old spark plugs. Use a torque wrench to tighten the Champion 7429 spark plug to the manufacturer’s recommended specifications to avoid damage. Verify the pre-gap size of 0.032 inches before installation, although the plug comes pre-gapped. The bi-hex 14mm hex size fits standard spark plug sockets for ease of service. Avoid over-tightening to maintain proper sealing and prevent thread damage.

Quality Assurance and Warranty

Champion spark plugs undergo rigorous quality control to meet OEM standards for fitment and performance. The Double Platinum Power 7429 spark plug is manufactured with high-grade materials including platinum electrodes to ensure durability and consistent ignition. While specific warranty details are not provided, Champion products typically meet industry standards for reliability and longevity.