What This Mirror Is and What It Fits
This is the full driver side mirror assembly for the Cascadia — housing, glass, heater element, and power motor for remote adjustment. It bolts to the door-mounted arm and plugs into the factory harness. No wiring splices, no soldering.
Freightliner ran the Cascadia body style from 2008 clean through to today, but they changed the mirror mounting and wiring setup a few times over the years. The A22-73907-004 covers 2018-2025 trucks specifically. Earlier Cascadias use a different number, different plug shape, sometimes even a different arm length.
Before you order, pull the sticker off the driver door jamb and get the VIN, or better yet, pull the old mirror and read the number stamped on the back of the housing or molded into the plastic. That number is your go-to reference here — it tells you exactly what generation you've got, no guessing from the model year alone.
How These Cross Numbers Line Up
A22-73907-000 and A22-73907-004 are close cousins — same mirror family, same mounting, but Freightliner bumped the suffix when they made running changes to the heater wiring or the motor internals. On paper they look like the same part, and for most trucks in the 2018-2025 window they interchange fine, but the suffix change usually means something got revised inside, so don't assume without checking.
A2275498000 is Freightliner's older internal part numbering format for essentially the same physical mirror — same drum size, same arm, same plug. It shows up a lot on older invoices and in some parts catalogs still running the old numbering scheme. 563.46101 is the same mirror under a supplier's own catalog number, common when you're cross-shopping from a jobber that doesn't stock direct Freightliner numbers.
The one to watch is A22-78606-004, listed as Freightliner OEM. That number sometimes shows up in cross-reference lists but it's actually a different mirror configuration — different arm bracket in some builds. Don't just match the last four digits and call it a day. If you're not 100% sure, give us the VIN or bring in the old part and we'll match it before it ships.
Ordering From PartStop
We're in Tacoma and we keep this one in stock because Cascadias make up a big chunk of what rolls through the yard around here. Local fleet drops in, we can usually get it in their hands same day.
Ship nationwide too — doesn't matter if you're running a truck out of Ohio or Texas, this goes in a box and out the door same day if you order before our cutoff.
Comes with the standard 6+ month warranty. If it shows up and doesn't match your old mirror's mounting or plug, call us before you install it — much easier to sort out a return on a part that's still in the box than one that's already been bolted on and wired in.
A22-73907-004 Cross-Reference & Interchange Numbers
These manufacturer and aftermarket numbers commonly cross-reference to A22-73907-004. 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 |
|---|---|
| Freightliner | A22-73907-000, A2275498000, 563.46101 |
| Freightliner (OEM) | A22-78606-004 |
Frequently asked questions
Does A22-73907-004 fit my 2016 Cascadia?
Probably not — this number's built for the 2018-2025 mirror mounting and wiring setup. 2016 trucks are more likely running an earlier Freightliner mirror number with a different arm or plug configuration. Check your door jamb VIN or pull the old mirror and read the number off the housing before ordering.
Is this the same mirror as A2275498000?
Yes, that's the same physical mirror, just listed under Freightliner's older internal numbering format. Same arm, same drum size, same plug. If your old mirror's got that number stamped on it, this one crosses over fine, but confirm the plug shape matches before you toss the old one.
What's the difference between this and A22-78606-004?
That one gets listed as a cross sometimes but it's actually a different mirror configuration, different arm bracket in some builds. Don't swap on number similarity alone — send us your VIN or the number off your old mirror and we'll tell you straight if it matches.
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
Need the part, not just the reading?
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.