大众帕萨特桑塔纳奥迪A4 04E905612/0241140512铱铂金火花塞

When idle is unstable, acceleration weak, fuel consumption rises, or cold-start is difficult, indicates spark plug electrodes are severely worn or carbonized; replace promptly. This iridium-platinum spark plug is responsible for precise ignition of the mixture in normal operation, ensuring smooth power output and efficient combustion, reducing emissions and improving fuel economy. Suitable for VW Passat, Santana, Audi A4 (post-2000), OEM 04E905612 and 0241140512. Use a torque wrench to tighten to about 25–30 N·m to avoid over-tightening the head threads or under-tightening causing leaks.