Parts for your 2020 Suzuki Splash-Thermostat

2020 Suzuki Splash Thermostat: What It Does, Why It Matters, and When to Replace It

Based on Suzuki workshop documentation for the K‑series engines (K10B/K12M) used in the Splash, plus Suzuki’s electronic parts catalog listings for the coolant outlet housing, the 2020 Suzuki Splash is fitted with a conventional wax‑pellet engine coolant thermostat. It sits in the outlet housing on the engine and regulates flow to the radiator. So yes—this model absolutely uses a thermostat, and it’s a relevant service item.

The thermostat’s job is to help the engine reach and hold the sweet‑spot temperature—typically opening in the mid‑80s °C range—so it warms up quickly, runs efficiently, and doesn’t overheat. When it’s working right, the Splash delivers stable cabin heat, steady fuel economy, and consistent gauge readings. When it’s not, there’s a real chance of overcooling, slow warm‑up, ping‑ponging temps, or proper overheating. Running without a thermostat isn’t a hack