Volvo FH4/FM4 AdBlue Control Unit 21870075 22449430 23719482 Euro 6 Used Other Exhaust & Emissions

Description:
This listing is for a used genuine Volvo AdBlue / SCR aftertreatment control unit (ACM) manufactured by Continental. The module controls the urea (AdBlue) dosing system used to reduce NOx emissions on Euro 6 Volvo and Renault trucks. Correct operation of this unit is essential for maintaining Euro 6 emissions compliance and preventing derate or warning messages related to the SCR/AdBlue system.

The control unit shown in the photos carries Continental markings and label details including approval E1 03 6643 / 10R-03 6643, Continental part A2C8296890200 and Volvo part number 21870075-P03. Cross-referenced OE numbers found in Volvo and Renault parts catalogues include Volvo 21870075, 22449430 and 23719482, and Renault Trucks 7422449430. These numbers all refer to the same AdBlue/SCR ECU used on a range of Euro 6 vehicles.

This module is typically chassis-mounted near the AdBlue tank on the right-hand side of the vehicle, inside a protective bracket. It interfaces with the engine ECU and dosing system to control AdBlue injection, monitor NOx sensors and manage diagnostics.

Before dismantling, the donor truck’s SCR system was tested and confirmed to be operating correctly with no active fault codes relating to the AdBlue ECU. After removal, the unit was visually inspected and bench-tested for basic power-up and communication, confirming that it is a good working used module. The alloy base shows oxidation and surface corrosion from normal road exposure, but there are no cracks in the casting or plastic cover. All four main mounting eyes are usable and the multipole connector housing and pins are undamaged.

Compatibility (based on manufacturer data and current online catalogues): fits Euro 6 Volvo FE, FL, FM and FH series trucks from approximately 2013–2022 and corresponding Euro 6 Renault Trucks platforms including C 2.5m, D-Narrow 2.1m, D-Wide and T series. Always match the part number 21870075 (or listed supersessions 22449430 / 23719482 / 7422449430) with your existing unit and consult your dealer or workshop to confirm compatibility with your exact VIN, engine variant and emission level.

Technical details and features:
- Type: AdBlue / SCR aftertreatment control unit ECU for heavy commercial vehicles
- Brand: Volvo (OE) / Continental electronics
- OE numbers: 21870075-P03, 21870075, 22449430, 23719482, Renault 7422449430
- Supplier number: A2C8296890200
- Voltage: 24V electrical system
- Emission level: Designed for Euro 6 Volvo/Renault trucks
- Construction: Aluminium heatsink base with sealed plastic upper housing
- Mounting: Four corner bushings plus locating pins, external chassis installation near AdBlue tank
- Approximate size and weight: about 23 x 15 x 5 cm, around 1.3 kg
- Country of manufacture: Made in Germany (as marked on the label)

Installation notes:
The replacement of SCR/AdBlue control units should be carried out by a qualified technician. In most cases the ECU will require coding, software download or parameterisation to the vehicle using Volvo/Renault diagnostic equipment, and fault codes must be cleared after installation. Always ensure all connectors are clean and dry, and that the system has no underlying wiring or sensor faults before fitting a replacement module.

This is a used original part, ideal as a cost-effective replacement compared with new dealer prices. Please compare the images, connector layout and all part numbers with your existing unit to ensure it is the correct version for your truck.

Shipping & Returns:
We ship across UK/EU with tracked services. Returns accepted within 30 days; buyer pays return postage. Please inspect upon arrival and message us with any concerns.

Why Buy From Us:
Genuine part, 3-month warranty, fast dispatch, secure packaging.