沃尔沃点火线圈 31358940 高压包 替换 31312514

Volvo four-cylinder engine models use 31358940 ignition coil, a direct replacement for OEM 31312514. Converts low voltage to high voltage to ignite the spark plugs and maintain stable engine operation. After installation, noticeable improvements in acceleration lag, idle jitter, and power loss, especially during cold starts. If misfire, sudden fuel economy drop, or check engine light on, usually due to ignition coil aging or leakage; replace promptly.