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OE Quality
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Bosch 0444021021 Diesel Exhaust Fluid (DEF) Module
Bosch Actual OE Urea Metering Module
The Bosch Actual OE Urea Metering Module is a diesel exhaust fluid (DEF) module built for direct-fit emission control service on select Audi, Porsche, and Volkswagen diesel applications. Part number 0444021021 is an OE-style replacement for vehicles that rely on precise urea dosing to support SCR system operation.
Bosch’s Actual OE Urea Metering Module line focuses on original-equipment-level fuel and emission system components for diesel passenger vehicles, SUVs, vans, and pickups. This module is engineered for the same application coverage as the factory unit and is a direct reference for 0444021021.
Key Features
- Diesel Exhaust Fluid (DEF) metering module for emission control service
- Actual OE Urea Metering Module replacement from Bosch
- Part number 0444021021 for direct identification
- Cross-reference: 3C0131113C
- Fits select Audi Q7, Audi A6 Quattro, Audi A7 Quattro, Audi A8 Quattro, Audi Q5, Porsche Cayenne, Volkswagen Touareg, and Volkswagen Passat diesel applications
Fitment Coverage
- Fits 2016 Audi A8 Quattro, N/A
- Fits 2014-2015 Audi A6 Quattro, N/A
- Fits 2014-2015 Audi A7 Quattro, N/A
- Fits 2014-2015 Audi A8 Quattro, N/A
- Fits 2014-2015 Audi Q5, N/A
- Fits 2010-2015 Audi Q7, N/A
- Fits 2013-2015 Porsche Cayenne, N/A
- Fits 2010-2015 Volkswagen Touareg, N/A
- Fits 2012-2014 Volkswagen Passat, N/A
What This Part Helps Address
- DEF metering faults that trigger emission system warnings
- SCR dosing irregularities affecting diesel exhaust treatment
- Check engine lights related to urea delivery performance
- Factory module wear or failure in the DEF system
- Restoration of proper emission control function on supported Audi, Porsche, and Volkswagen models
Installation Notes and Tips
Verify the original part number and vehicle application before installation. This module is used in emission control systems, so clean connections, correct routing, and proper diagnostic clearing are important after replacement. Confirm the vehicle’s diesel exhaust fluid system condition and inspect related components for contamination or damage before final assembly.
Quality Assurance
Bosch is a major original-equipment supplier of diesel fuel system technology for passenger cars, SUVs, vans, and pickups. The Actual OE Urea Metering Module line is built to match the intended factory application for direct replacement service.
| Brand | Bosch |
|---|---|
| Part Number | 0444021021 |
| Position | Actual OE Urea Metering Module (New) |
| Cases Per Pallet (ORLY) | 1 |
| Unit(s) per Car Qty (ORLY) | 1 |
This part fits 53 vehicles. Search below:
| Year | Make | Model | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|
| 2016 | Audi | A8 Quattro | 3.0L | V6 | N/A | Actual OE Urea Metering Module |
| 2015 | Audi | A6 Quattro | 3.0L | V6 | N/A | Actual OE Urea Metering Module (New) |
| 2015 | Audi | A6 Quattro | 3.0L | V6 | N/A | Actual OE part; Urea Metering Module (New) |
| 2015 | Audi | A7 Quattro | 3.0L | V6 | N/A | Actual OE Urea Metering Module (New) |
| 2015 | Audi | A7 Quattro | 3.0L | V6 | N/A | Actual OE part; Urea Metering Module (New) |
| 2015 | Audi | A8 Quattro | 3.0L | V6 | N/A | Actual OE Urea Metering Module (New) |
| 2015 | Audi | A8 Quattro | 3.0L | V6 | N/A | Actual OE part; Urea Metering Module (New) |
| 2015 | Audi | Q5 | 3.0L | V6 | N/A | Actual OE Urea Metering Module (New) |
| 2015 | Audi | Q5 | 3.0L | V6 | N/A | Actual OE part; Urea Metering Module (New) |
| 2015 | Audi | Q7 | 3.0L | V6 | N/A | Actual OE Urea Metering Module (New) |
| 2015 | Audi | Q7 | 3.0L | V6 | N/A | Actual OE part; Urea Metering Module (New) |
| 2015 | Porsche | Cayenne | 3.0L | V6 | N/A | Actual OE Urea Metering Module (New) |
| 2015 | Porsche | Cayenne | 3.0L | V6 | N/A | Actual OE part; Urea Metering Module (New) |
| 2015 | Volkswagen | Touareg | 3.0L | V6 | N/A | Actual OE Urea Metering Module (New) |
| 2015 | Volkswagen | Touareg | 3.0L | V6 | N/A | Actual OE part; Urea Metering Module (New) |
| 2014 | Audi | A6 Quattro | 3.0L | V6 | N/A | Actual OE Urea Metering Module (New) |
| 2014 | Audi | A6 Quattro | 3.0L | V6 | N/A | Actual OE part; Urea Metering Module (New) |
| 2014 | Audi | A7 Quattro | 3.0L | V6 | N/A | Actual OE Urea Metering Module (New) |
| 2014 | Audi | A7 Quattro | 3.0L | V6 | N/A | Actual OE part; Urea Metering Module (New) |
| 2014 | Audi | A8 Quattro | 3.0L | V6 | N/A | Actual OE Urea Metering Module (New) |
| 2014 | Audi | A8 Quattro | 3.0L | V6 | N/A | Actual OE part; Urea Metering Module (New) |
| 2014 | Audi | Q5 | 3.0L | V6 | N/A | Actual OE Urea Metering Module (New) |
| 2014 | Audi | Q5 | 3.0L | V6 | N/A | Actual OE part; Urea Metering Module (New) |
| 2014 | Audi | Q7 | 3.0L | V6 | N/A | Actual OE Urea Metering Module (New) |
| 2014 | Audi | Q7 | 3.0L | V6 | N/A | Actual OE part; Urea Metering Module (New) |
| 2014 | Porsche | Cayenne | 3.0L | V6 | N/A | Actual OE Urea Metering Module (New) |
| 2014 | Porsche | Cayenne | 3.0L | V6 | N/A | Actual OE part; Urea Metering Module (New) |
| 2014 | Volkswagen | Passat | 2.0L | L4 | N/A | Actual OE Urea Metering Module (New) |
| 2014 | Volkswagen | Passat | 2.0L | L4 | N/A | Actual OE part; Urea Metering Module (New) |
| 2014 | Volkswagen | Touareg | 3.0L | V6 | N/A | Actual OE Urea Metering Module (New) |
| 2014 | Volkswagen | Touareg | 3.0L | V6 | N/A | Actual OE part; Urea Metering Module (New) |
| 2013 | Audi | Q7 | 3.0L | V6 | N/A | Actual OE Urea Metering Module (New) |
| 2013 | Audi | Q7 | 3.0L | V6 | N/A | Actual OE part; Urea Metering Module (New) |
| 2013 | Porsche | Cayenne | 3.0L | V6 | N/A | Actual OE Urea Metering Module (New) |
| 2013 | Porsche | Cayenne | 3.0L | V6 | N/A | Actual OE part; Urea Metering Module (New) |
| 2013 | Volkswagen | Passat | 2.0L | L4 | N/A | Actual OE Urea Metering Module (New) |
| 2013 | Volkswagen | Passat | 2.0L | L4 | N/A | Actual OE part; Urea Metering Module (New) |
| 2013 | Volkswagen | Touareg | 3.0L | V6 | N/A | Actual OE Urea Metering Module (New) |
| 2013 | Volkswagen | Touareg | 3.0L | V6 | N/A | Actual OE part; Urea Metering Module (New) |
| 2012 | Audi | Q7 | 3.0L | V6 | N/A | Actual OE Urea Metering Module (New) |
| 2012 | Audi | Q7 | 3.0L | V6 | N/A | Actual OE part; Urea Metering Module (New) |
| 2012 | Volkswagen | Passat | 2.0L | L4 | N/A | Actual OE Urea Metering Module (New) |
| 2012 | Volkswagen | Passat | 2.0L | L4 | N/A | Actual OE part; Urea Metering Module (New) |
| 2012 | Volkswagen | Touareg | 3.0L | V6 | N/A | Actual OE Urea Metering Module (New) |
| 2012 | Volkswagen | Touareg | 3.0L | V6 | N/A | Actual OE part; Urea Metering Module (New) |
| 2011 | Audi | Q7 | 3.0L | V6 | N/A | Actual OE Urea Metering Module (New) |
| 2011 | Audi | Q7 | 3.0L | V6 | N/A | Actual OE part; Urea Metering Module (New) |
| 2011 | Volkswagen | Touareg | 3.0L | V6 | N/A | Actual OE Urea Metering Module (New) |
| 2011 | Volkswagen | Touareg | 3.0L | V6 | N/A | Actual OE part; Urea Metering Module (New) |
| 2010 | Audi | Q7 | 3.0L | V6 | N/A | Actual OE Urea Metering Module (New) |
| 2010 | Audi | Q7 | 3.0L | V6 | N/A | Actual OE part; Urea Metering Module (New) |
| 2010 | Volkswagen | Touareg | 3.0L | V6 | N/A | Actual OE Urea Metering Module (New) |
| 2010 | Volkswagen | Touareg | 3.0L | V6 | N/A | Actual OE part; Urea Metering Module (New) |
* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
This part directly replaces or is cross-referenced with the following part numbers:
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.