Bosch 12-12-0-035-531 Double Iridium Spark Plug - ZR7SI332S

The Bosch 12-12-0-035-531 is a high-performance double iridium spark plug engineered for superior ignition reliability and extended service life. This premium spark plug features an ultra-fine 0.6mm iridium firing pin paired with an iridium ground electrode inlay, delivering exceptional ignitability and combustion efficiency compared to conventional spark plugs.

Key Features:

• Double iridium construction with ultra-fine wire iridium firing pin and iridium ground electrode inlay for maximum performance and durability
• Laser-welded iridium alloy provides superior retention and longevity
• 0.6mm fine wire center electrode ensures better ignitability and reduces fouling
• Copper core helps prevent pre-ignition and maintains optimal heat dissipation
• Nickel-plated shell with rolled threads offers excellent anti-seize and corrosion protection
• Ribbed insulator design prevents flashover for consistent spark delivery
• Pre-gapped to 0.028 inches (0.7mm) for precise ignition timing
• M12 x 1.25mm thread with 26.5mm reach and 14mm hex size
• Gasket seat design with projected center electrode and built-in 5 kOhm resistor for interference suppression

This Bosch spark plug is manufactured to OEM specifications and is also known by Bosch part numbers 0242135518, ZR7SI332S, and 9710. Cross-references to OEM part number 12120034098. Tightening torque specification is 23 Nm (17 lb-ft). The double iridium construction provides significantly longer service life while maintaining consistent ignition performance throughout the plug's lifespan.