Mercedes Sprinter Engine Thermostat – Genuine OEM | VS30 2.0L OM654 Diesel | #6542000215 (2023+)

A stuck-closed thermostat on a VS30 Sprinter will push the engine straight toward overheating — and a stuck-open one will keep it running cold, hurting fuel economy, increasing wear, and triggering fault codes that won't clear until the thermostat is replaced. This is the Genuine Mercedes-Benz OEM engine thermostat for VS30 Sprinters equipped with the 2.0L OM654 diesel engine, a direct replacement that restores precise coolant flow control and proper thermal management across all operating conditions.

What This Part Does

The thermostat is a wax-element valve mounted in the coolant circuit between the engine and the radiator. When the engine is cold, the thermostat remains closed, blocking coolant flow to the radiator so the engine reaches operating temperature as quickly as possible. Once the coolant temperature reaches the calibrated opening point, the wax element expands, the valve opens, and hot coolant begins circulating through the radiator to be cooled. The thermostat modulates continuously between open and closed to hold the engine in its optimal temperature range. On the OM654, this precise temperature regulation is critical not just for efficiency but for emissions compliance, DPF regeneration cycles, and long-term engine health.

Common Symptoms of a Failing Thermostat

• Engine slow to reach operating temperature or running persistently cooler than normal (stuck open)
• Engine overheating, particularly under load or in stop-and-go traffic (stuck closed)
• Heater output that is weak or takes an unusually long time to warm the cabin
• Temperature gauge that fluctuates erratically instead of holding steady
• Check engine light with fault codes related to engine coolant temperature or thermostat performance

When to Replace

Replace when the thermostat is confirmed stuck, sluggish, or failing to maintain the correct temperature range under XENTRY or scan tool diagnostic. Also replace as part of a cooling system overhaul — a thermostat is inexpensive insurance compared to the cost of diagnosing an intermittent temperature issue later.

VS30 OM654 Specific — VIN Verification Required

This thermostat is for VS30 Sprinters equipped with the 2.0L OM654 diesel engine. It is not compatible with VS30 models equipped with the 3.0L OM642 or NCV3 Sprinters equipped with the 2.1L OM651. Always verify your engine code and VIN before ordering. Contact us and we'll confirm fitment before you buy.

Fitment

• 2023+ Mercedes-Benz Sprinter 2500 – 2.0L OM654 Diesel (VS30)
• 2023+ Mercedes-Benz Sprinter 3500 – 2.0L OM654 Diesel (VS30)
• 2023+ Mercedes-Benz Sprinter 3500XD – 2.0L OM654 Diesel (VS30)

Part Numbers

• Mercedes OEM: 6542000215 / A6542000215 / 654-200-02-15
• Manufacturer: Genuine Mercedes-Benz
• SKU: 6542000215OE