Jeep Gladiator JT Rear Fender Liners: Install and Care Guide
By Body Armor 4x4 | Published: 2026-11-03
Category: 操作指南
Install and care for Jeep Gladiator JT rear fender liners with a step-by-step process, fitment checks, and maintenance tips to protect your fuel filler and wheel wells.
Quick answer
Install Jeep Gladiator JT rear fender liners by test-fitting them first, confirming you have compatible aftermarket fender flares, and then bolting them into the stock wheel wells. Clean them regularly with mild soap and water to maintain the powder coat finish and keep mud away from the fuel filler.
Why rear fender liners matter on the Gladiator JT
The Gladiator JT’s rear wheel wells are exposed to road spray, mud, and debris thrown by the tires. Without liners, that debris packs into the wheel well and can reach the fuel filler area, which is a known vulnerability on the JT. Fender liners close off that space, protecting the fuel filler and improving the look of the stock wheel wells. They also make cleaning easier because you’re wiping a smooth powder-coated surface instead of raw metal and hidden crevices.
Fitment check before you start
Body Armor 4x4 rear fender liners are designed to work with BA 4x4 fender flares, but they will not work with the factory fender flares. If you’re still running stock flares, you’ll need to upgrade to compatible aftermarket flares first. Also confirm your Gladiator is a JT model (2019–2026) and that the liners are for the rear position. This guide assumes you have the correct liners and any needed flares already installed.
Tools and prep
Gather basic hand tools: a socket set, ratchet, extension, and possibly a trim removal tool if you’re removing existing plastic liners. A jack and jack stands are helpful for extra clearance, but you can often work with the vehicle on the ground. Before installing, wash the wheel wells thoroughly and let them dry so dirt doesn’t get trapped behind the new liners.
Step-by-step installation and care
- Test-fit the liner before bolting: Hold the liner up to the wheel well and check that the mounting holes align with the factory locations. Do not tighten any bolts yet. Common mistake: forcing a liner into place can crack the powder coat or strip threads. Checkpoint: the liner should sit flush against the wheel well without gaps or interference.
- Secure the liner with the supplied hardware: Start all bolts by hand to avoid cross-threading, then tighten them in a crisscross pattern to evenly seat the liner. If you’re reusing factory bolts, inspect them for corrosion and replace if needed. Common mistake: over-tightening can distort the liner or damage the powder coat. Checkpoint: the liner should be snug with no movement when you gently push on it.
- Verify clearance and fuel filler access: With the liner installed, check that it doesn’t rub on the tire at full droop or steering lock (rear suspension articulation). Also confirm the fuel filler area is fully covered and that the liner doesn’t block the filler neck. Common mistake: forgetting to cycle the suspension can lead to tire rub on the first trail ride. Checkpoint: no contact between tire and liner throughout suspension travel.
- Clean regularly to protect the finish: Wash the liners with mild soap and water, and rinse thoroughly after off-road trips to remove mud and road salt. Avoid abrasive cleaners or pressure washing directly at seams, which can chip the powder coat. Common mistake: letting mud dry and cake on can trap moisture and dull the finish. Checkpoint: after cleaning, inspect for chips and touch up promptly to prevent corrosion.
- Inspect hardware and finish every few months: Check that all bolts remain tight and that the powder coat is intact. Re-torque bolts if you notice loosening, and apply a touch-up paint to any chips. Common mistake: ignoring small chips can lead to rust over time. Checkpoint: schedule a quick inspection before and after off-road seasons.
Product facts
- 2019-2026 JEEP GLADIATOR JT REAR FENDER LINERS: Bolt-on installation with a durable 2-stage light textured black powder coat finish. Bolt-on means you can install with hand tools, and the powder coat resists chips and fading for a clean look over time.
2019-2026 JEEP GLADIATOR JT REAR FENDER LINERS - 2019-2026 JEEP GLADIATOR JT REAR FENDER LINERS: Designed to work with BA 4x4 fender flares and will not work with factory fender flares. Check your flare setup first; if you have stock flares, you’ll need compatible aftermarket flares before these liners will fit.
- 2019-2026 JEEP GLADIATOR JT REAR FENDER LINERS: Protects the fuel filler from mud and debris and improves the look of the stock wheel wells. This directly addresses a common JT concern while giving the rear wheel wells a finished appearance.
