VAG Sender Unit, Coolant Temperature - 4H0121089E

This VAG Sender Unit for Coolant Temperature (part number 4H0121089E) is designed to provide precise and reliable readings of your engine's coolant temperature. Accurate temperature monitoring is crucial for the proper functioning of your vehicle's engine management system, including fuel injection and ignition timing. By ensuring the engine control unit (ECU) receives correct temperature data, this sender unit helps to prevent overheating, optimize fuel efficiency, and maintain smooth engine operation. It is manufactured to meet or exceed original equipment specifications, guaranteeing a perfect fit and dependable performance. Replacing a faulty coolant temperature sender unit can resolve issues such as poor starting, rough idling, incorrect fuel consumption, and the illumination of the check engine light. This unit is a direct replacement for the original VAG component, simplifying installation and ensuring compatibility with your vehicle's existing systems.

• Direct replacement for VAG part number 4H0121089E
• Ensures accurate engine coolant temperature readings
• Critical for optimal engine performance and protection
• Helps prevent overheating and maintain fuel efficiency
• Supports correct fuel injection and ignition timing
• Designed to meet or exceed OEM specifications
• Reliable and durable construction for long service life
• Easy installation