Description
Windshield Washer Fluid Reservoir Cap for Jeep Wrangler JK, JL & Gladiator JT
Replace your missing, cracked, or loose-fitting windshield washer fluid reservoir cap with this direct OEM replacement. Fits 2007-2018 Jeep Wrangler JK/JKU, 2018-2023 Jeep Wrangler JL/JLU, and 2020-2023 Jeep Gladiator JT models. A proper seal on your washer reservoir prevents fluid evaporation, keeps debris out of the system, and ensures your washer pump operates at full pressure when you need it most — whether clearing mud from a trail run or salt spray from winter driving.
Key Features
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Direct OEM Replacement: Manufactured to match the original factory cap dimensions exactly — same snap-fit retention, same vent design, same sealing performance
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Secure Snap-Fit Design: Audible click confirms proper installation — won't vibrate loose on rough trails or at highway speeds
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UV-Resistant Polypropylene: Durable plastic construction resists cracking, fading, and warping from engine bay heat and direct sun exposure
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Proper Venting: Integrated vent prevents vacuum lock in the reservoir while keeping dirt, dust, and moisture out
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Universal JK/JL/JT Fit: One cap fits all 2007-2023 Jeep Wrangler and 2020-2023 Gladiator models — no need to worry about model year variations
Compatibility
| Year Range |
Make |
Model |
| 2007-2018 |
Jeep |
Wrangler JK / JKU |
| 2018-2023 |
Jeep |
Wrangler JL / JLU |
| 2020-2023 |
Jeep |
Gladiator JT |
Why Replace Your Washer Cap?
A missing or broken washer fluid cap seems minor — until you're on the highway with a salt-covered windshield or on a dusty trail with zero visibility. An unsealed reservoir allows washer fluid to evaporate, dirt to contaminate the system, and can cause the washer pump to lose prime. This affordable replacement prevents those problems and takes 5 seconds to install.
Frequently Asked Questions
Q: Will this fit my 2015 JK Unlimited?
A: Yes, this cap fits all 2007-2018 Wrangler JK and JKU models. The washer fluid reservoir cap design was unchanged throughout the entire JK production run.
Q: Is this an exact OEM match?
A: Yes, this cap matches the OEM Mopar part (55077249AB) in dimensions, material, and fit. It snaps securely and seals properly — indistinguishable from the original.
Q: Does it fit the rear window washer reservoir?
A: No, this is for the front windshield washer reservoir only. The JK rear washer reservoir (if equipped) uses a different cap design located in the rear cargo area.
Q: Will this cap crack in cold weather?
A: The polypropylene material is rated for temperatures from -40°F to 240°F, making it suitable for extreme cold climates without becoming brittle. It also withstands the engine bay heat of desert off-road driving.
