Bosch 03H-905-600 A Double Iridium Spark Plug

The Bosch 03H-905-600 A is a premium double iridium spark plug engineered for superior ignition performance and extended service life. This OEM-quality spark plug features advanced iridium technology on both the center electrode and ground electrode, delivering enhanced durability and more efficient combustion compared to conventional spark plugs.

Key Features:

• Ultra-fine 0.6mm iridium center electrode for improved ignitability and flame kernel development
• Iridium-inlay ground electrode with laser-welded construction for superior retention and longevity
• Copper core design helps prevent pre-ignition and fouling
• 12mm thread diameter with 1.25mm pitch and 26.5mm reach
• Factory-preset gap of 0.031 inches (0.8mm) - do not adjust to prevent electrode damage
• Nickel-plated shell with rolled threads provides anti-seize and corrosion protection
• Ribbed insulator design prevents electrical flashover
• Built-in resistor for electromagnetic interference suppression

This spark plug is manufactured to strict OEM specifications and carries cross-reference numbers including Bosch 0242140528, Bosch 7431, YR6TII330T, and OEM numbers 101905622 (Audi), and 95517022090 (Porsche). The double iridium construction provides exceptional wear resistance and maintains consistent performance throughout the plug's service life, making it an ideal choice for enthusiasts seeking factory-specification replacement parts with premium durability.