Product Description
MOPAR 68085921AC DIESEL EXHAUST FLUID (DEF) SUPPLY TUBE & HARNESS FOR 13-18 RAM WITH 6.7L CUMMINS ENGINE
Maintain proper DEF delivery and emissions system performance with the genuine Mopar 68085921AC Diesel Exhaust Fluid (DEF) Supply Tube & Harness for 2013-2018 Ram trucks equipped with the powerful 6.7L Cummins turbo diesel engine. Engineered to OEM factory standards, this DEF injector feed line and wiring harness assembly provides reliable DEF flow from the tank to the injector while supporting proper SCR emissions operation.
The Mopar 68085921AC DEF supply tube and harness assembly is designed to replace damaged, leaking, restricted, or failed factory DEF lines that can trigger emissions-related fault codes, reduced engine performance, DEF system warnings, or limp mode conditions. Built using durable OEM-grade materials and heat-resistant construction, this direct-fit replacement ensures dependable long-term operation in harsh diesel environments.
This complete assembly combines both the DEF fluid delivery tube and integrated electrical harness to simplify installation and restore factory functionality. Genuine Mopar construction guarantees proper routing, secure connections, and seamless compatibility with the factory selective catalytic reduction (SCR) and DEF injection system.
The 68085921AC replaces previous Mopar part numbers 68085921AA and 68085921AB while maintaining full OEM fitment and emissions compliance for compatible Ram diesel applications.
FAQ
What does the DEF supply tube and harness do?
This assembly delivers Diesel Exhaust Fluid from the DEF tank to the DEF injector while supplying the necessary electrical connections for system operation.
What symptoms indicate a failing DEF supply tube?
Common symptoms include DEF leaks, emissions warning lights, reduced engine power, SCR system faults, and DEF pressure or flow-related trouble codes.
Is this a genuine Mopar OEM part?
Yes. The 68085921AC is a genuine OEM Mopar DEF supply tube and harness assembly designed specifically for Ram 6.7L Cummins applications.
Does this replace older part numbers?
Yes. This part supersedes Mopar part numbers 68085921AA and 68085921AB.
Is installation direct-fit?
Yes. This OEM assembly is manufactured for direct replacement installation using factory routing and mounting locations.
Vehicle Fitment
- 2013 Ram 2500 6.7L Cummins Diesel
- 2014 Ram 2500 6.7L Cummins Diesel
- 2015 Ram 2500 6.7L Cummins Diesel
- 2016 Ram 2500 6.7L Cummins Diesel
- 2017 Ram 2500 6.7L Cummins Diesel
- 2018 Ram 2500 6.7L Cummins Diesel
- 2013 Ram 3500 6.7L Cummins Diesel
- 2014 Ram 3500 6.7L Cummins Diesel
- 2015 Ram 3500 6.7L Cummins Diesel
- 2016 Ram 3500 6.7L Cummins Diesel
- 2017 Ram 3500 6.7L Cummins Diesel
- 2018 Ram 3500 6.7L Cummins Diesel
Fits Select Trims Including:
Tradesman, SLT, Big Horn, Lone Star, Outdoorsman, Laramie, Laramie Longhorn, Limited
Specifications for Mopar 68085921AC
| Category | Details |
|---|---|
| Part Number | 68085921AC |
| Brand | Mopar (OEM) |
| Product Type | Diesel Exhaust Fluid (DEF) Supply Tube & Harness |
| Engine Compatibility | 6.7L Cummins Turbo Diesel |
| Vehicle Fitment | 2013-2018 Ram 2500/3500 |
| Function | Transfers DEF fluid from tank to injector while supporting emissions system operation |
| System Compatibility | Selective Catalytic Reduction (SCR) / DEF Emissions System |
| Installation Type | Direct OEM Replacement |
| Construction | OEM Heat-Resistant DEF Hose and Integrated Wiring Harness |
| Connector Type | Factory OEM Electrical Connectors |
| Replaces Part Numbers | 68085921AA, 68085921AB |
| UPC | Not Available |
| GTIN | Not Available |
| Shipping Weight | Approx. 1 lb |
| Shipping Dimensions | Approx. 18" x 13" x 4" |
| Shipping | Standard ground shipping available |
| Operating Benefits | Restores DEF flow, supports proper SCR function, reduces emissions faults, improves system reliability, maintains emissions compliance |
| Prop 65 | WARNING: Cancer and reproductive harm – www.P65Warnings.ca.gov |
| Condition | New |
