Protect your engine’s performance across Colorado’s diverse seasons with expert coolant service at Flatirons Subaru in Boulder. From mountain drives to stop-and-go traffic, your Subaru’s cooling system plays a vital role in regulating engine temperature and preventing damage caused by extreme heat or freezing conditions. Whether you’re due for a routine coolant flush or suspect a coolant leak, our Factory Trained Teams are here to help ensure your Subaru stays adventure-ready.
Schedule your coolant service today — and experience the Flatirons difference.
Your Subaru’s engine produces a lot of heat during normal operation. Coolant (also called antifreeze) circulates through the system to absorb this heat and transfer it away from the engine. Without the correct coolant type and dilution ratio, your engine could overheat, freeze, or experience long-term internal damage. That’s why it’s essential to maintain your cooling system according to Subaru’s recommended intervals — and only with Genuine Subaru coolant.


Coolant flush intervals vary based on your Subaru model and the type of coolant used:
Our team always references your owner’s manual and Subaru’s latest maintenance guidelines to recommend the ideal service schedule for your vehicle.
When you bring your vehicle to Flatirons Subaru for a coolant service, we provide more than just a fluid swap. Our service includes:
Not sure if it’s time to service your coolant? Here are some common warning signs:
If you’re experiencing any of these issues, we recommend visiting Flatirons Subaru for an inspection right away.

At Flatirons Subaru, we combine factory-trained expertise, Genuine Subaru parts, and cutting-edge diagnostics to provide Boulder-area drivers with unmatched care. Our service experience includes:
Q: Can I top off my coolant at home?
A: You can, but only if you’re using the correct Subaru-approved coolant. Mixing incompatible coolants can damage your system. Always refer to your owner’s manual or ask our team for guidance.
Q: What type of coolant does Subaru use?
A: Most newer Subaru models use a long-life Super Coolant (SOA868V9270), which is blue in color and OAT-based. However, color isn’t a reliable indicator — always verify the part number or consult your manual.
Q: Can I drive if my coolant is low?
A: We don’t recommend it. Running your Subaru with low coolant can lead to overheating, head gasket failure, or worse. Stop driving and have your vehicle inspected immediately.
Q: Do you offer coolant-related service specials?
A: Yes! Flatirons Subaru regularly offers rotating service specials, including coolant flush discounts.
We’re proud to serve Subaru owners from Boulder, Longmont, Lafayette, and beyond. Whether you’re maintaining your cooling system, replacing tires, or getting routine service, our team is committed to keeping your Subaru running safely and smoothly — mile after mile.
📍 Visit Us: 5995 Arapahoe Ave, Boulder, CO 80303
📞 Service Department: 720-477-7903