Gates Heater Hose 02-1625

A cracked, softened, or leaking heater hose is a coolant leak waiting to happen — and once one lets go, you lose cabin heat and engine coolant at the same time. The Gates 02-1625 is a direct-fit replacement built to original material and routing specification.

Key Benefits

Here’s what this hose brings to the job:

• Built from EPDM (ethylene propylene diene Monomer (M-class) rubber), matching the material spec of the original hose for heat and coolant resistance
• Designed for the water pump connection point, matching your vehicle’s original routing
• Rated for continuous coolant temperature exposure, unlike a generic universal hose cut to length
• Sourced from Gates, a supplier of automotive cooling and hose components

What’s In The Box

• Brand: Gates
• Part / Model Number: 02-1625
• EAN/Barcode: 5400608128024
• Fitting Position: Water Pump
• Material: EPDM (ethylene propylene diene Monomer (M-class) rubber)
• Colour: black

Because heater hoses are matched to exact routing, diameter, and material specifications, always verify fitment using the EAN/barcode or part number above rather than the vehicle make and model alone — the same platform can ship from the factory with more than one hose configuration depending on engine and HVAC layout. If you’re cross-shopping, our full heater hose selection lets you compare fitting positions and materials side by side before you commit to a part number.

Application & Use Case

Heater hoses carry hot engine coolant from the engine block to the heater core and back, running continuously any time the engine is running regardless of whether the heater is turned on. Because they’re constantly exposed to heat, pressure, and engine bay conditions (oil, road grime, vibration), they age and harden over time even without an obvious external cause. For background on where this part sits in the broader system, see how automotive HVAC systems work.

Warning signs include a hose that feels unusually soft, spongy, or bulging when squeezed (cold engine only, for safety), visible cracking or a chalky/glazed surface texture, coolant residue or stains along the hose or at a fitting, or a sweet coolant smell in the engine bay. A hose that’s failed completely will typically cause rapid coolant loss and a rising temperature gauge, which is a drive-it-immediately-or-don’t situation. Confirm the 02-1625 matches your vehicle’s original part number, material, and fitting position before ordering — heater hoses vary in diameter, length, and end-fitting design between vehicles, and a mismatched hose won’t seal correctly even if it looks similar.

Installation Overview

Heater hose replacement starts with the cooling system cold and depressurized — never remove a radiator or hose fitting on a hot engine, since pressurized hot coolant can cause serious burns. Once safe, the cooling system is drained (or partially drained, depending on hose location), the hose clamps are loosened at both ends, and the old hose is removed and replaced with the 02-1625, matching the same routing to avoid kinks or contact with hot engine components. New clamps are generally recommended over reusing old ones, since worn clamps are a common cause of a repeat leak even with a new hose installed correctly. After installation, the cooling system should be refilled and properly bled to remove trapped air, then run and checked for leaks at both fittings before considering the job complete.

Quality & Manufacturing Standards

Gates is a US-based manufacturer founded in 1911 with a long history in belts, hoses, and fluid power components, supplying both vehicle manufacturers and the independent aftermarket. Component suppliers in this category typically manufacture under IATF 16949–aligned or ISO 9001 quality systems, industry standards for consistent, defect-controlled production.

Shipping & Delivery

This part ships from our US warehouse network to all 50 states. Order processing and transit times are listed on our shipping policy. Every order includes tracking, and our contact team can help if you need it faster for a vehicle that’s currently off the road.

Support, Warranty & Returns

We stand behind what we sell: review our warranty policy and terms of service before you buy, browse our FAQ page for common fitment and shipping questions, or contact us directly if you have a question this listing doesn’t answer. You can also browse our full heater hose selection to compare this hose against other options for your vehicle. Learn more about how we source and vet the parts we carry on our about us page.

Frequently Asked Questions

How do I know which end of a heater hose is which?

Check the fitting position noted in the specifications above if listed. Heater hoses typically run between a fitting on the engine or water pump and a fitting on the heater core, and the two ends often have different diameters or bend angles, so match the routing carefully rather than assuming either end works at either connection.

Is this the correct heater hose for my specific vehicle?

Match the part number, EAN, and material/fitting details listed above against your vehicle’s original hose or service documentation. If you’re not sure, contact our team and we’ll help confirm fitment before you order.

Can I install this myself?

Heater hose replacement is one of the more accessible cooling system repairs for a DIYer with basic tools, as long as you let the engine cool completely and follow proper cooling system bleed procedures afterward. Access varies by vehicle depending on how deep in the engine bay the fittings sit.

Should I replace the hose clamps at the same time?

Yes, this is generally recommended. Reusing old clamps that have already been compressed and cycled through heat exposure is a common cause of a new hose still developing a leak at the fitting shortly after installation.

What coolant should I use when refilling the system?

Use the coolant type specified for your vehicle by the manufacturer — coolant formulations vary and mixing incompatible types can cause corrosion or reduced cooling performance. Check your owner’s manual or the coolant reservoir cap for the correct spec.

How long does shipping take?

See our shipping policy for current delivery timing. We ship to all 50 US states.

What’s your return and warranty policy?

Full terms are posted on our warranty policy page. If a part arrives damaged or doesn’t match your order, contact our team and we’ll help sort out a replacement or return.

Do I need to bleed the cooling system after installation?

Yes — after any hose replacement that involves draining coolant, the system should be properly bled to remove trapped air. Air pockets can cause overheating or poor heater performance even when the new hose is installed correctly.

Is a core exchange required on this part?

No core exchange is required for this hose — it ships as a standalone replacement unit.

What does “02-1625” mean on the box?

That’s the Gates part number for this exact hose — 02-1625. Use it to cross-reference against your old part or your vehicle’s parts catalog to confirm you’re ordering the correct unit.