别克雪弗兰GM火花塞线束套件 9748HH 48322R 88862122 点火分线

This Buick Chevrolet GM spark plug wire set (model 9748HH) installs in the engine ignition system to transfer high-voltage from the ignition coils to each spark plug, ensuring timely ignition of the air-fuel mixture and engine smooth operation. Fits Buick matched models such as Regal, LaCrosse, Cruze, etc. OEM number 12558693, may replace 48322R, 88862122 and other part numbers. Replacement difficulty medium; about 1-1.5 hours; remove ignition coils and spark plug boots; avoid wire twisting or contact with hot components. If idle vibration, weak acceleration, check engine light, or poor cold starting with higher fuel consumption occur, wire aging or insulation damage is likely; replace promptly.