How much does a mechanic charge for coolant flush?
Most shops charge about $150 to $250 for a full cooling-system flush, while a simple drain-and-fill can cost roughly $70 to $120. Dealer service departments and luxury shops can push prices higher, sometimes well above $300.
Understanding what a coolant flush involves
A coolant flush is a maintenance service that removes old antifreeze and debris from the cooling system and replaces it with fresh coolant. A full flush uses a machine and cleaner to thoroughly rinse the passages in the engine, radiator, heater core, and hoses. A drain-and-fill simply drains the old coolant and refills with new coolant, which may be sufficient if the system isn’t contaminated or hasn’t required a prior flush. The price largely reflects the method used, the vehicle’s complexity, and the shop’s labor rate.
Is there a difference between flush methods?
Yes. A full flush is more comprehensive and typically costs more, while a drain-and-fill is quicker and cheaper. Some shops may label a drain-and-fill as a “flush,” so it’s important to ask what is included in the service description and whether the system was actually cleaned.
Pricing snapshot
The following ranges reflect typical charges in the United States as of 2025. The exact price depends on location, shop, and vehicle.
- Drain-and-fill (basic coolant change, no full system cleaning): $50–$120
- Full coolant flush (machine-assisted, system cleaned, new coolant): $120–$250
- Dealership or luxury-brand service (often higher): $250–$500 or more
These figures generally cover labor, coolant, and standard disposal fees. If the shop detects issues requiring extra parts or repairs, the final bill can be higher.
What factors affect the price
Several variables influence the final cost of a coolant flush. Understanding them helps you compare quotes and avoid surprises.
- Vehicle type and engine design (some layouts are more labor-intensive)
- Region and shop type (urban areas and dealership/service centers tend to be pricier)
- Coolant specification (OEM vs universal/extended-life coolant)
- Whether a full flush is required or a simpler drain-and-fill suffices
- Additional components that may be replaced or tested (thermostat, hoses, radiator cap)
- Labor time and local wage rates
Being informed about these factors helps you set expectations and compare quotes more accurately.
Ways to save on a coolant flush
Tips to help you reduce costs without compromising quality:
- Get written estimates from several shops and compare line items
- Ask if a drain-and-fill is enough per your vehicle’s manufacturer guidelines
- Coordinate the coolant flush with other cooling-system maintenance (thermostat, hoses, radiator)
- Check if the shop offers loyalty pricing or online coupons
- Bring your vehicle’s specified coolant type if you know it, to avoid upcharges
With proactive shopping and a clear service scope, you can often save 10–30% or more depending on where you’re located.
Summary
Coolant flush pricing varies widely, but the market typically falls into a few buckets: a basic drain-and-fill is usually under $120, a full system flush runs about $150–$250, and dealer or luxury shops can charge $250–$500 or more. The exact cost depends on the vehicle, the method used, and regional labor rates. Always request a detailed estimate that itemizes labor, parts, and any potential extra charges, and consider coordinating the flush with other cooling-system maintenance to maximize value.
