Volvo Ignition Coil 31358940 High Voltage Coil Replaces 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.