What You're Actually Buying
This is a NOx sensor - it reads nitrogen oxide levels in the exhaust stream, either pre or post SCR catalyst depending on which position you're replacing, and feeds that data to the aftertreatment control module so it can dose DEF correctly.
On the DD15 in the Cascadia, these run 2015 through 2024, but Freightliner and Detroit Diesel have shuffled part numbers a few times over that run as suppliers changed. That's normal, not a red flag.
Bad NOx sensors throw codes like SPN 3216 or 3226 depending on position, and derate the truck fast if the ECM thinks your SCR isn't converting properly. If you're getting a derate warning and DEF quality checks out, sensor's a common culprit.
Reading the Cross-Reference Numbers
A0101531828, DDEA0101531828, A0101531828001, EA0101531828, and RA0101531828 all trace back to the same sensor design - the prefix letters (DD, EA, RA) are just how different catalogs and suppliers tag the same Freightliner part number internally. Doesn't mean they're different parts.
Where you need to slow down is position. Upstream (pre-SCR) and downstream (post-SCR) sensors often use different numbers even on the same truck, so don't assume one number covers both spots. Check which one you're pulling before you order.
Surest way to confirm: pull the number off the sensor you're removing, or run your truck's VIN. Don't go by year alone - Freightliner made changes mid-run on some trims, and we've seen 2018s that don't match a 2019 down the same line.
Ordering From PartStop
We're in Tacoma and keep DD15 sensors in stock for same-day pickup or local delivery if you're broke down in the yard and need it now. Ship nationwide too if you're not local - most orders go out same day.
Comes with our standard 6+ month warranty. This is an aftermarket cross-reference part, not a Detroit Diesel-branded sensor, so we're not calling it identical to the dealer part - just built to match fit and function for that position.
If you're not sure which sensor position you need or the number doesn't match what's on your old part, call the counter before you order. Cheaper to spend five minutes on the phone than to send back a sensor that doesn't plug in.
A0101531828 Cross-Reference & Interchange Numbers
These manufacturer and aftermarket numbers commonly cross-reference to A0101531828. 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 |
|---|---|
| OE/Cross-Ref | DDEA0101531828, A0101531828001, EA0101531828 |
| Detroit Diesel (OEM) | RA0101531828 |
Frequently asked questions
Does A0101531828 fit my 2017 Cascadia with a DD15?
Likely, but confirm by checking the number stamped on your old sensor or running your VIN. Freightliner shuffled suppliers a few times in this range, so match the number, not just the year.
Is DDEA0101531828 the same as A0101531828?
Yes, same sensor - DDEA0101531828 is just how Detroit Diesel's system tags the identical part number internally. Cross-references clean, no functional difference.
How do I know if it's the upstream or downstream sensor I need?
Pull the failing sensor and check its number and position - upstream sits before the SCR catalyst, downstream after. They don't always share the same part number even on the same truck.
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.