GDUKOP Windshield Washer Reservoir — Toyota Tacoma 1998–2004, Cap & Bottom Sensor Hole

The GDUKOP 8531504060 windshield washer reservoir is a direct-fit replacement tank with a sealing cap and a bottom sensor hole designed to restore washer-fluid delivery and sensor function on Toyota Tacoma models from 1998–2004.

This replacement reservoir is engineered as a like-for-like swap for worn, cracked, or leaking original tanks. Molded from heat-resistant plastic, it tolerates under-hood temperatures while resisting deformation and leaks. It arrives complete with a secure cap and the correct opening configuration, including a sensor hole at the bottom for vehicles that use a level sensor.

Will this reservoir fit my Toyota Tacoma?

This tank is specified for Toyota Tacoma model years 1998 through 2004 and matches OEM part numbers for straightforward installation. Verify fitment by comparing the listed OE numbers to your vehicle’s existing part or service manual before purchase.

• Compatible years: Toyota Tacoma 1998–2004
• OE/reference numbers: 8531504060, TO1288184, 85315-04060, 12498759
• Includes the bottom sensor hole for Tacomas equipped with a level sensor

How durable and reliable is this replacement reservoir?

GDUKOP builds the reservoir from heat-resistant, automotive-grade plastic to reduce the risk of cracking and leaks in the engine bay. The molded construction and reinforced mounting points help maintain proper alignment and fluid containment under normal driving conditions.

• Constructed from durable, heat-resistant plastic
• Reinforced mounting points for secure attachment
• Designed to resist deformation from engine heat

What installation details should I expect?

The part is supplied ready to install with a sealing cap included; most owners can complete the swap using basic hand tools. Because the reservoir features a bottom sensor hole, ensure your vehicle’s sensor is reinstalled in the correct location and any connecting hoses are routed as on the original tank.

• Comes with cap tightened for immediate installation
• Requires basic hand tools and minimal mechanical experience
• Sensor hole and hose connections match OEM layout for easy reattachment

How does this reservoir support windshield washer performance?

A leak-free, properly sized reservoir maintains fluid supply to the washer pump so wipers and nozzles function consistently when needed. Replacing a damaged reservoir eliminates air ingress and leaks that can cause intermittent or failed washer operation.

• Ensures steady fluid delivery to the washer pump
• Prevents leaks and contamination with a secure cap
• Maintains correct sensor positioning when equipped

Who is this for: This GDUKOP reservoir is intended for Toyota Tacoma owners (1998–2004) needing a reliable, OEM-replacement washer fluid tank—especially if the original is cracked, leaking, missing the cap, or if your vehicle uses a bottom-mounted fluid level sensor. It’s also a good option for mechanics and DIY enthusiasts looking for a durable, direct-fit part that arrives ready to install.