Coolant Heater Glow Plug (ALH/BEW)
Check these out if you seem to be lacking heat on cold days, they help boost the heater until the engine warms up. They will eventually burn out on older high KM cars. Pull the wire plug and check for an open circuit, if you have one or more open then it's time to replace them all and improve your heating system. Three required to replace all.
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