Bosch 8189 Spark Plug

Bosch OE Fine Wire Double Platinum Spark Plug

Bosch 8189 is an OE-style double platinum spark plug built for consistent ignition performance and extended service life. It is a direct fit for select Porsche 911, Cayenne, and Panamera applications, with fine wire electrode design and platinum on both firing surfaces to help reduce gap wear over time.

Key Features

• OE Fine Wire Double Platinum design for stable spark delivery
• Platinum center electrode tip and platinum ground electrode tip
• Fine wire center electrode design for efficient ignition response
• Resistor spark plug with 6000 ohm resistance
• Standard J-gap ground configuration with flat seat
• Copper core construction with ceramic insulator
• 14 mm thread diameter, 26.5 mm reach, 16 mm hex size
• Heat range 6 with non-removable nut terminal

Product Details

Bosch OE Fine Wire Double Platinum spark plugs are engineered around OE specifications for double platinum applications. Part number 8189 uses a platinum firing pin on the center electrode and a platinum inlay on the ground electrode to help limit gap erosion and maintain performance characteristics over time. This Bosch 8189 spark plug is a practical OE replacement choice for Porsche 911, Porsche Cayenne, and Porsche Panamera models that call for this plug design.

The fine wire center electrode, copper core construction, and resistor design support reliable ignition performance in modern 4-cycle engines. For buyers searching for a Bosch 8189 spark plug for Porsche 911, Cayenne, or Panamera fitment, this part matches the OE-style double platinum format used in the listed applications.

What It Helps Address

• Misfires caused by worn or eroded spark plug electrodes
• Hard starting from weakened ignition output
• Rough idle related to inconsistent spark delivery
• Reduced ignition performance from aged plugs
• Service intervals affected by plug wear in double platinum applications

Installation Notes and Tips

Verify engine application, thread diameter, reach, seat type, and heat range before installation. Bosch 8189 uses a flat seat, 14 mm thread, 26.5 mm reach, and 16 mm hex, so matching the OE specification is important for proper fitment. Inspect the ignition system, coil condition, and plug wires or coil boots during service, and follow the vehicle manufacturer’s torque specification.

Fits 2010-2019 Porsche 911, N/A. Fits 2008-2018 Porsche Cayenne, N/A. Fits 2010-2016 Porsche Panamera, N/A.

Quality Assurance

Bosch designs the OE Fine Wire Double Platinum line to meet original equipment specifications for double platinum spark plugs. The platinum-on-platinum electrode construction is used to support durability and consistent performance in the listed Porsche applications.