A glow plug is a heating device in each cylinder of a diesel engine that helps the engine to start. This is done by a glow plug control module. The control module uses a input from the engine control unit to determine information related to the working of the glow plugs. This includes when to switch the current for the glow plugs on and off, and how much current is required as this will differ depending on the starting temperature of the engine.

• Performs like OE to ensure quality and reliability out of the box
• High-quality material construction

The modern diesel engine is subject to strict exhaust emission guidelines, the glow plug and the glow controller play an important role in complying with these standards. Hitachi Astemo's Glow Plug Relays (GLPs) are constructed with high quality materials to ensure that even under the most extreme conditions the relay will not malfunction. Designed to meet the needs of each specific vehicle, Hitachi Astemo's Glow plug relays are the premium choice.