Description
Detroit Diesel RA0101538128 is the remanufactured outlet (downstream) NOx sensor for the SCR aftertreatment system on DD13, DD15, and DD16 engines, restoring the post-SCR NOx reading the ECM uses to verify catalyst efficiency and trim DEF dosing. The R-prefix indicates a Detroit Diesel reman exchange unit; it is functionally equivalent to OE A0101538128 (new) and EA0101538128 (prior exchange) and uses the Continental 5WK97403 sensor element.
Signs You Need a New NOx Sensor
- SCR efficiency or NOx conversion fault codes (active or stored)
- Engine derate or DEF system warning lamp
- Frequent regeneration cycles or rising DEF consumption
- Failed roadside emissions check or visible NOx-related MIL
Specifications
| Manufacturer | Detroit Diesel (reman, exchange unit) |
|---|---|
| Part Number | RA0101538128 |
| Part Type | NOx Sensor — Outlet (downstream of SCR) |
| Voltage | 12V nominal |
| Cable Length | ~18 in |
| Operating Temperature | -40 °C to 115 °C |
| Sensor Element | Continental 5WK97403 |
| Engine Compatibility | Detroit DD13, DD15, DD16 (SCR-equipped, 2011–2017) |
| Core Charge | Applies — see cart for current amount |
Cross References
This part replaces or is equivalent to the following part numbers:
- Detroit Diesel: A0101538128 (new OE), EA0101538128 (exchange)
- Continental: 5WK97403
Applications
This outlet NOx sensor fits the following engines:
- Detroit DD13 12.8L (2011–2017, SCR)
- Detroit DD15 14.8L (2011–2017, SCR)
- Detroit DD16 15.6L (2011–2017, SCR)
Representative vehicles using these engines:
- Freightliner Cascadia (2011–2017)
- Freightliner Coronado, 122SD, 114SD, M2 112
- Western Star 4900, 5700XE
Confirm sensor position (inlet vs. outlet) before ordering — the inlet sensor uses a different Detroit part number. Verify with engine serial number or fault code logged.
