What You're Actually Buying
This is a common-rail injector for the DD engine family, machined and calibrated to work with the ECM tune on those trucks. It's not a rebuild-in-a-box deal - it's a new unit that has to match the bore, the seal package, and the injector coding your truck expects.
The numbers on this listing - 4720700387, RPP4720700887X, A4720700087, A4720700887 - are all pointing at the same core injector design, just different points in Detroit's part numbering as they revised seals or updated the casting. Don't assume identical means interchangeable without checking your VIN or the number stamped on the injector you're pulling.
How the Cross-Reference Numbers Line Up
Detroit Diesel's own numbers - RA4600700587, EA4720700887, RA4600701087, EA4600700587 - show up because Detroit uses different prefixes for remanufactured (RA) versus new (EA) units, and sometimes revises the base number when they update an O-ring or the injector coding chip. Same physical injector, different paperwork trail.
Turbochargers Direct's INJ-100454-TDR is an aftermarket cross for the same application - different manufacturer, same fit intent. Where these injectors bite people is injector coding (the 16-digit code on the injector has to get programmed into the ECM) and the copper seal/washer stack at the nozzle tip. Get either wrong and you'll have a fuel trim code or a leaker on start-up.
Bottom line: match the number off your old injector, not just the truck's year and model. DD13 and DD15 share a lot of architecture but not every injector across every emissions update.
Buying It From Us
We stock this injector at the Tacoma counter and it's shipped nationwide same day if you order before our cutoff. If you're local and down a truck, call ahead and we'll have it up front waiting.
Comes with our standard 6+ month warranty. If you're not 100% sure this is your injector, snap a photo of the stamped number and text it to us before you buy - cheaper than guessing on a $700 part.
A4720700887 Cross-Reference & Interchange Numbers
These manufacturer and aftermarket numbers commonly cross-reference to A4720700887. 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 |
|---|---|
| Detroit Diesel | RA4600700587, EA4720700887 |
| Turbochargers Direct | INJ-100454-TDR |
| Detroit Diesel (OEM) | RA4600701087, EA4600700587 |
Frequently asked questions
Does A4720700887 fit my 2016 Cascadia with a DD15?
Likely yes, but confirm by pulling the number off your current injector or checking your VIN against the DD15 build spec - Detroit revised injector coding a few times in that engine's run, so don't go off model year alone.
Is this the same as the Turbochargers Direct INJ-100454-TDR?
Same application, different manufacturer - it's an aftermarket cross, not the identical part off the same line. Functionally it's built to cover the same fitment, but confirm your seal kit and injector coding either way.
My old injector is stamped RA4600700587 - will A4720700887 work?
Those two numbers cross in our system, with RA4600700587 being Detroit's reman designation. Should work, but check the coding chip and seal size against your old unit before you button it up.
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.