Ignition components tend to wear out over years of use, including glow pugs. They may fail to maintain proper heat levels to properly ignite the fuel during cold starts and weather. By replacing the glow plugs and pre-heating unit, you can expect significantly quicker and more reliable cold starts with your N47-powered BMW. This kit includes everything needed to service your glow plugs including 4x Glow plugs 1x Pre heating unit Intake manifold gaskets Throttle body gasket
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