Tech Tuesday Tip: Left or Right? How to Identify Exactly Which ATV/UTV Axle You Need
Jul 07, 2026
Tech Tuesday Tip: Left or Right? How to Identify Exactly Which ATV/UTV Axle You Need
More wrong-part returns start with this one question than any other we get: "Is this the left or the right one?"
Every week riders text us things like "I need part 39186, it's the passenger side — don't know if you consider that right or left before I order" and "I need a rear axle, driver side, for a 2017 RZR 900 S." The confusion is completely understandable — and getting it right the first time saves you a return, a re-ship, and downtime.
This guide settles it for good.
Left = driver, right = passenger — always judged from the seat, facing forward.
The Rule That Decides Left vs. Right
Left and right are always determined from the driver's seat, sitting on the machine, facing forward — not while you're standing in front of it looking back at it.
This single rule is the source of most mix-ups.
- Left = Driver side (your left hand while seated)
- Right = Passenger side (your right hand while seated)
So when someone walks up to the front of their UTV and points at the axle "on the right as I look at it," that's actually the left/driver-side axle.
If you remember nothing else, remember this: orientation is judged from inside the machine.
Front or Rear: Confirm Before You Confirm a Side
Before left vs. right even matters, lock in front vs. rear. Many ATVs and side-by-sides use four different axles — left front, right front, left rear, right rear — and they are not interchangeable.
A common ordering pattern we see is a rider who needs all four for a project — for example, "what part numbers do I need for both front and both rear CV axles for a 2013 Ranger Crew 800 EPS?"
Sort the position first. Then sort the side.
Does Side Even Matter for Your Machine?
Here's the part most guides skip: on some models, the left and right axles are identical. On others, they're different lengths or spline counts. You can't assume either way.
| Situation | What it means for ordering |
|---|---|
| Left and right are the same part | One axle covers both positions — side doesn't matter, quantity does |
| Left and right differ (length/spline) | You must specify the side, or the axle won't seat correctly |
| Front vs. rear differ | Always position-specific — never swap front and rear |
Because this varies by year, make, model, and trim, the safest move is to verify against fitment data rather than guess. Our team checks this for riders constantly — it's exactly why we ask for the full year/make/model before confirming a side.
How to Tell Which One You Have
- Check the part number on the old axle. If you can read the OEM number on the shaft or bag, we can match it and tell you the side.
- Look at what failed. If only one boot is torn or one side is clicking, that's your starting position — but confirm the side using the seated-driver rule above.
- When in doubt, send a photo. Riders text us pictures of the old part all the time, and that often resolves it in one message.
The Mistake to Avoid
Ordering "the right one because that's the side it's on as I look at it." That phrasing flips the answer.
Translate what you see into the seated-driver frame before you check out. If you're not 100% sure, don't guess — a 30-second verification beats a return every time.
Find the Right Axle for Your Machine
Use our Year / Make / Model search at the top of the page to narrow down to axles confirmed for your exact machine and position.
If left vs. right is ambiguous on your model, text or call us at 813-814-2521 with your year, make, model, and the side that failed — we'll confirm the correct part before you order so it fits right the first time.
