The Multiquip 8983023940 NOX Sensor is a genuine OEM component designed for DCA400SSI4F series Super-Silent diesel generators, including the DCA400SSI4F, DCA400SSI4F3, DCA400SSI4F3PB, and DCA400SSI4F3PD variants. As a direct OEM replacement, this sensor meets the exact specifications required to keep Tier 4 emission control systems operating correctly. Sourced directly from Multiquip, part 8983023940 ensures proper integration with the generator's engine management and exhaust aftertreatment system. Verify your model code against the fitment list before ordering to confirm compatibility with your unit.
Key Features
- Genuine OEM Emissions Accuracy — Manufactured to the exact output and signal specifications required by the Tier 4 engine management system, ensuring the sensor reads exhaust nitrogen oxide levels within the tolerances the ECU expects.
- Direct Plug-In Replacement — Engineered to match the original connector, thread pitch, and mounting configuration, allowing straightforward installation without modification to the wiring harness or exhaust bung.
- Broad DCA400SSI4F Series Coverage — Confirmed fitment across DCA400SSI4F, DCA400SSI4F3, DCA400SSI4F3PB, and DCA400SSI4F3PD Super-Silent generator variants.
- Protects Engine and Aftertreatment System — A correctly functioning NOX sensor allows the engine control unit to regulate fuel delivery and DEF dosing precisely; a failed sensor can trigger fault codes, derate engine output, or cause unnecessary regeneration cycles.
- Emissions Compliance Critical — On Tier 4 Final engines, an accurate NOX sensor is a regulatory requirement for legal operation. Using a genuine OEM part ensures the sensor meets the certification baseline the engine was type-approved with.
The NOX sensor monitors the concentration of nitrogen oxide gases in the exhaust stream and sends a continuous signal to the engine control unit. The ECU uses this data to regulate selective catalytic reduction (SCR) dosing — the injection of diesel exhaust fluid — so that tailpipe emissions stay within Tier 4 Final limits. When the sensor fails or drifts out of calibration, the ECU loses the feedback it needs to dose accurately, which can result in fault codes, power derate modes, or excess NOX output that puts the machine out of compliance. Replacing a faulty sensor with a genuine OEM unit restores closed-loop emission control and returns the generator to full rated output.
For fitment questions or additional technical support, contact the DHS Equipment parts team directly.
Part Details
| Part Number | 8983023940 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | NOX Sensor |
Compatibility & Fitment
| Name | Model |
|---|---|
| Super-Silent Generators | DCA400SSI4F3B |
| Super-Silent Generators | DCA400SSI4F3PD |
| Super-Silent Generators | DCA400SSI4F |
| Super-Silent Generators | DCA400SSI4F3 |
| Super-Silent Generators | DCA400SSI4F3PB |
| Super-Silent Generators | DCA400SSI4F3PD (SUNBELT) |
| Super-Silent Generators | DCA400SSI4F/4F3/4F3PB |
Verify Before You Order
Fitment is machine-number and revision-specific; always confirm your model and serial number against the fitment list.
Why Buy From DHS Equipment
Every part is verified against the manufacturer's part number before it ships, so what you order is what arrives. We carry parts from leading OEM brands and our own DHS Quality Parts line of professional aftermarket components. Need help finding the right part? Our team is available to confirm compatibility whenever you need it. Orders are processed fast to keep your jobs on track. We don't just sell parts. We keep you jobsite ready.
Questions? Contact our team at [email protected] or 866-611-9369 — DHS Equipment is here to help you maintain peak performance.
