Coolant Sensor

The Malibu / Chevrolet Coolant Temperature Sensor is a critical engine management component used on GM L-series platforms including LY6, L96, LS3, and LSA engines. This sensor monitors engine coolant temperature and sends real-time data to the ECM, helping optimize fuel mixture, ignition timing, cold-start performance, and engine protection strategies. Built with marine-grade materials and OEM-spec threading and sealing, this sensor ensures reliable performance in demanding marine environments. A failing coolant temp sensor can cause hard starts, poor fuel economy, inaccurate temp readings, or engine warning codes—making timely replacement important for peak engine health. Key Features: Direct replacement for GM L-series marine engines Accurate temperature feedback to ECM OEM-style connector and thread fitment Helps prevent overheating and performance issues Marine-ready durability and sealing Common Symptoms of Failure: Erratic temperature gauge readings Check engine light Hard cold starts Rich or lean running conditions Fitment: Compatible with GM-based LY6, L96, LS3, and LSA marine engine applications (including Malibu Monsoon platforms where applicable).