Quick answer
To order the right Freightliner Cascadia mirror: (1) identify whether the damaged unit is the door-mounted main mirror or the hood-mounted fender mirror — they are different, non-interchangeable parts; (2) pick the side using the DRIVER'S left/right; (3) match heated/power by counting the pins on the old connector; (4) confirm with the number molded into the old housing or your VIN. Aftermarket direct replacements install in about 20 minutes with hand tools.
Ordering the wrong side or the wrong mirror type is the #1 cause of returns. Here's how to identify exactly which Cascadia mirror you need before you buy.
Two different mirrors, two different parts
A Freightliner Cascadia carries two distinct mirror systems: the large door-mounted main mirror (with the flat glass on top and the convex spotter below) and the smaller hood-mounted fender mirror out on the front corner. They are completely different assemblies and are never interchangeable — the most common ordering mistake is buying a hood mirror when the broken one is on the door, or vice versa.
Before ordering, stand at the front of the truck and note which unit is damaged: mounted to the cab door frame = door mirror; mounted on the hood near the headlight = hood (fender) mirror.
Left vs right is the driver's left and right
Mirror listings use the driver's orientation, sitting in the seat: LEFT = driver side, RIGHT = passenger side. On many trucks the two sides are NOT symmetrical — arms, glass angles and heater connectors can differ — so a right-side mirror will not simply bolt onto the left door.
If the label on your old mirror is gone, the giveaway is the convex spotter angle: it is aimed down toward the trailer wheels on its own side.
Heated, powered, or manual?
- Manual: glass adjusts by hand, no wiring. Cheapest, common on day cabs and older trucks.
- Heated: a heating element behind the glass clears frost and spray — check for a two-wire connector on the old unit.
- Power: motors aim the glass from an in-cab switch — check for a multi-pin connector.
- Heated + power: the most common spec on late-model Cascadias. Count the pins on your old connector and match it — a powered mirror on a truck without the switch harness will never move.
Match by cross-reference number, not by photo
Photos of black mirror housings all look alike. The reliable way to match is the number moulded into the old housing or printed on its label — search it on our catalog and the cross-reference match shows every compatible aftermarket direct replacement we carry. If your number isn't listed, call us with your VIN and we'll verify fitment before you pay.
Replacement is a 20-minute driveway job
Door mirrors mount with a handful of fasteners behind small covers on the door frame; hood mirrors mount through the hood skin. Disconnect the battery before unplugging heated/powered connectors, support the mirror while removing the last bolt (assemblies are heavier than they look), and torque evenly so the arm doesn't vibrate loose.
Frequently asked questions
Are Cascadia door and hood mirrors interchangeable?
No. The door-mounted main mirror and the hood (fender) mirror are completely different assemblies with different mounts and part numbers. Ordering the wrong one is the #1 cause of mirror returns.
How do I know if my Cascadia mirror is heated or powered?
Check the connector on the old unit: no wiring = manual, a two-wire connector = heated, a multi-pin connector = power (or heated + power, the most common late-model spec). Match the pin count when ordering.
How do I make sure a part fits my truck?
Use the free VIN lookup at partstop.net/vin (parts verified against your truck's build data), match the OEM / cross-reference number from your old part, or call (253) 600-1351 — fitment is checked before you buy.
What warranty do the parts carry?
Every PartStop part carries a 6+ month warranty against manufacturing defects, plus a 30-day return policy on unused items in original packaging.
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Premium-quality aftermarket direct replacements — nationwide same-day shipping, 6+ month warranty.
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.