Bosch 0444021021 Diesel Exhaust Fluid (DEF) Module

Brand	Bosch 0444021021
Product line	Actual OE Urea Metering Module (New)
Fits	Audi, Porsche, and Volkswagen · 53 vehicles

OE direct replacement. Actual OE urea metering module for diesel exhaust fluid systems.

Diesel exhaust fluid module for emission control applications.

Bosch OE pedigree. Built by a leading original-equipment supplier for diesel fuel systems.

Cross-references 3C0131113C for the same application. See all 1.

$160.39Free shipping

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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.

This part fits 53 vehicles

Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

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)
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Directly replaces or cross-references 1 part number

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.

3C0131113C