What This Fender Set Is
This is a two-piece quarter fender kit, 24 inches by 24 inches per half, built from stainless steel with a chrome finish. Quarter fenders hang behind the drive tires and catch spray, rock, and slush before it hits the trailer, the frame rails, and whatever is following you. They are a wear item on any truck that runs salted roads.
Stainless is the reason this part exists. Mild-steel and painted fenders start bubbling at the mount holes after one winter of brine, then the corrosion works outward until the bracket tears through. Stainless holds up in salt and moisture and keeps a polished face without repainting, which is why fleets spec it on trucks that stay in service for years.
The set ships with mounting hardware and is a bolt-on job on most standard semi truck frames — no cutting, no fabrication in the typical install. Manufactured by Ningbo Haishu Pino Metal Products Co., Ltd. and sold as aftermarket. It is a direct replacement for worn or damaged quarter fenders in this size class.
Why These Numbers Cross
Quarter fenders are a universal-fit accessory category. They are not built around a single truck's sheet metal — they are built around a common size and a common bracket mounting pattern. That is why 031-01120, Automann 562.9107, and World Truck Parts FIT-745SS51 all describe the same physical thing: a 24 x 24 stainless quarter fender set with the standard hole layout.
When the size, the material, and the mount pattern match, the numbers are interchangeable for identification purposes. Different suppliers assign their own catalog numbers to the same commodity part. Automann 562.9107 and FIT-745SS51 are listed here so you can confirm you are looking at the right size and construction before you order — nothing more.
Those other manufacturer numbers are for identification only. PartStop is not affiliated with, endorsed by, or authorised by Automann, World Truck Parts, or any truck manufacturer. A cross-reference is a starting point. Confirm fit against the number stamped or tagged on your old fender, or against your VIN and the bracket you are mounting to.
Check Before You Order
Measure the old fender before anything else. Quarter fenders come in several sizes and this set is 24 x 24 per side. If your truck runs a longer or shorter panel, this is not your part. Measure the flat, not the curve, and check whether you have single or tandem coverage.
Then look at the bracket and the mounting holes. The universal cut is designed to line up with common mount hole locations, but hardware carries over from truck to truck and old brackets get bent, elongated, or half-drilled by the last person who fixed it. If your bracket is chewed up, plan on replacing it at the same time — a good fender on a tired bracket will not survive.
031-01120 Cross-Reference & Interchange Numbers
These manufacturer and aftermarket numbers commonly cross-reference to 031-01120. Use them to identify the part — then confirm the exact fit by VIN or the number stamped on your old unit before you order. An interchange is a starting point, not a fitment guarantee.
| Brand / Line | Cross-Reference Numbers |
|---|---|
| Automann | 562.9107 |
| World Truck Parts | FIT-745SS51 |
Frequently asked questions
Will 031-01120 replace Automann 562.9107?
It is listed as a cross-reference to 562.9107 based on matching size, material, and mount pattern. Both describe a 24 x 24 stainless quarter fender set. Verify against the number on your old part or measure the fender you are pulling off before ordering — a cross-reference is a starting point, not a fitment guarantee.
Does this fit Peterbilt, Kenworth, Freightliner and Volvo?
It is a universal 24 x 24 cut intended to line up with common quarter fender mount hole locations across major heavy-duty makes. Because it is universal rather than model-specific, fit depends on your bracket and mounting hardware, not on the badge. Check your existing bracket and hole spacing against the set before install.
Is this real stainless or chrome-plated steel?
It is stainless steel with a chrome finish, not plated mild steel. That matters in salt country — plated mild steel rusts from behind the plating and blisters at the mount holes, while stainless resists that corrosion. Expect it to hold appearance longer with less maintenance than a painted or plated fender.
Not sure it fits? We check before you pay.
Run your VIN and we’ll match parts to your exact truck, or call the counter — a person who knows trucks verifies fitment by OEM number before the order ships. No wrong-box returns.
More cross-reference guides
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Every part below is a Premium Quality aftermarket Direct Replacement with published OEM cross-reference numbers, a 6+ month warranty and same-business-day shipping from Tacoma, WA. Not sure it fits? Run your VIN — or call and a person who knows trucks will verify fitment before you pay.