Buick Excelle/Chevrolet Sail/Baojun 730 Iridium Spark Plug IKR7D 4759

When your Buick Excelle, Chevrolet Sail, or Baojun 730 shows idle instability, rough acceleration, cold-start difficulty, or noticeably higher fuel consumption, it usually indicates worn or heavily carboned spark plug electrodes and insufficient ignition energy. This part is responsible for igniting the air–fuel mixture to ensure smooth engine operation and power output. Fits New Excelle, New Sail 1.5, Baojun 730, and Liana (post-2000 models); OEM IKR7D 4759. Install with a torque wrench to manufacturer torque to avoid over-tightening and damaging the cylinder head or under-tightening causing leaks.