What This Belt Fits
This is an 8-rib V-ribbed serpentine belt, 8PK3228 in the shorthand - eight ribs, roughly 3228mm effective length. It drives the front-end accessories: alternator, water pump, AC compressor, fan depending on setup. Detroit used it across a range of applications, so 'fits my truck' isn't automatic just because you drive a Detroit-powered rig.
The number stamped or printed on the belt currently on your engine is your surest starting point. Pull it, or if it's worn smooth, get the VIN and call us - we can look up the build sheet and confirm before you order.
This isn't a universal belt cut to length. Pulley alignment, tensioner arm travel, and total rib count all have to match or you'll be back under the hood in a week.
Why These Numbers Cross
0131894700 is the Mercedes-Benz/Detroit heritage number - a lot of Detroit Diesel engines share parts lineage with Mercedes commercial engines, which is why you'll see MB-style part numbers on Detroit-branded components. A4729931596 and A4729933396 are both Detroit Diesel's own numbering, and they show up together because Detroit occasionally revises a part number without changing the actual belt - could be a supplier switch, a packaging update, whatever. Same physical belt, different paperwork trail.
Dayco's aftermarket numbers (8K1062, 4081063X, 5081063, etc.) exist because Dayco reverse-engineers the OEM spec - rib count, length, top and bottom profile - and builds to match. That's how a belt with zero Detroit branding ends up interchanging with a Detroit part number.
What actually matters when you're cross-referencing: rib count (8 here), belt length, and top surface profile if your engine uses a ribbed vs smooth backside for a poly-vee idler. Two belts can look identical hanging on a hook and still be 20mm off in length. Measure or match the number - don't eyeball it.
Ordering From PartStop
We're in Tacoma and keep this one in stock for same-day pickup or local delivery if you're within range. Order online and we ship nationwide - belts aren't heavy, they go out fast.
This is an aftermarket belt, not a Detroit-branded part, and we're not going to tell you it's identical to the dealer piece - it's a direct replacement built to the same spec, and it carries our 6+ month warranty if something's actually wrong with the belt itself.
If you're not 100% sure this crosses to your engine, give us the VIN or the number off the old belt before you buy. Ten minutes on the phone beats a belt sitting in a box because it's got 6 ribs and yours needs 8.
0131894700 Cross-Reference & Interchange Numbers
These manufacturer and aftermarket numbers commonly cross-reference to 0131894700. 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 |
|---|---|
| Dayco | 8K1062, 4081063X, 5081063, 5081063DY, 25-081062, 4729933396, 1081062, K081062, 25-081062HD, 8PK2700 |
| Detroit Diesel | A4729933396 |
Frequently asked questions
Does 0131894700 fit my Detroit Series 60?
Depends on the year and accessory package - Series 60 ran a few different belt configurations over its production run. Give us the VIN or pull the number off your current belt and we'll confirm before you order.
Is this the same as the Dayco 5081063DY?
They interchange - same rib count and length spec, just Dayco's aftermarket part number instead of Detroit's. Function and fit should match, but confirm the number on your old belt lines up before swapping.
What's actually different between A4729931596 and A4729933396?
Near as we can tell it's a Detroit internal revision, not a design change - both cross to the same belt. If your old part had one number and this cross shows the other, you're fine, but check length and rib count against the old belt if you want to be sure.
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.