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We’ve expanded our stock of genuine, new OEM One Box units for Freightliner, Detroit, Mercedes, and Western Star trucks. These are direct from the manufacturer so we can pass on big savings to you – better than most dealer pricing – in fact.
Need a One Box? We’ve got you covered. Whether you need a complete One Box assembly or individual components like DOCs, SCR units, DPFs, sensors, or filters, we have what you need.
Browse our current inventory of One Box units & related parts:
- DOC & Clamp Kits: Bare DOC & SCR unit.
- Complete One Box Assemblies: Includes DPFs, sensors, & electronics.
- Individual Components: Sensors, filters, & electronics.
Not sure which One Box is right for you? We’re happy to help. If you can provide the part number from your old One Box, it will help us quickly identify the correct replacement. Call us today! We’re here to assist you.
Freightliner One Box (13)
OEM Detroit / Mercedes / Western Star DOC & Clamp Kit (EA6804901456 / A6804901456)

OEM Detroit / Mercedes / Western Star DOC & Clamp Kit (EA6804901456 / A6804901456)
$8,250.00
This 2016 and newer OEM Detroit / Mercedes / Western Star DOC & Clamp Kit is brand NEW and has never been installed. This kit includes the DOC / SCR modules and inlet and outlet clamps and gaskets. This kit does not include any sensors, DPF, or other items. This product is not remanufactured, and does not have a core charge. OEM part number...

Redline Emissions Products Replacement Gasket / Clamp kit (REP VB3019)
$168.50
Redline Emissions Products VB3019. Gasket and clamps kit for Detroit / Mercedes Western Star single filter OneBox systems. Freightliner does not offer these so we decided to make our own kit! Consists of the following: (1) VB2042 Clamp (OEM #A0009957033) (1) VB2043 Clamp (OEM #A6809950501, A0039955101) (1) G03007 Gasket (OEM #A0004921680) (5) ...

OEM Detroit / Mercedes One Box NOx Sensor (SUR A0101538128)
$375.00
OEM DETROIT NOX SENSOR A0101538128 FOR ONE BOX AFTERTREATMENT SYSTEMS OEM SURPLUS. Fits specific Detroit-Mercedes aftertreatment systems, this is an outlet sensor. If sold out, see aftermarket replacement REP S11128 This is not an aftermarket part, it is OEM. These units are OEM "take-offs", they are brand new and unused but do not come in retai...
OEM Detroit Aftertreatment Wiring Harness (SUR A4721506220)

OEM Detroit Aftertreatment Wiring Harness (SUR A4721506220)
$425.00
OEM DETROIT WIRING HARNESS A4721506220 FOR OEM DETROIT-MERCEDES ONE-BOX APPLICATIONS. OEM SURPLUS FITS 2016 and newer Detroit Diesel Aftertreatment Systems Only! This is not an aftermarket part, it is OEM. These units are OEM "take-offs", they are brand new and unused but do not come in retail Detroit / Mercedes packaging. We buy complete units ...

New "Take-off" Detroit / Mercedes Aftertreatment Control Module / A0004469754
$475.00
OEM Detroit-Mercedes Aftertreatment Control Module (ACM) for One Box applications. Part #: A0004469754 - for 2016 and newer applications. No core charge required. This is not an aftermarket part, it is OEM. These units are OEM "take-offs", they are brand new and unused but do not come in retail Detroit / Mercedes packaging. We buy complete uni...
OEM Detroit One Box Pressure Tube (A6804913737)

OEM Detroit One Box Pressure Tube (A6804913737)
$38.00
OEM Detroit One Box Pressure Tube for Aftertreatment Systems. SUR A6804913737 These are brand new take-off parts from an unused complete assembly. For the replacement weld bung see BG2017. This is not an aftermarket part, it is OEM. These units are OEM "take-offs", they are brand new and unused but do not come in retail Detroit / Mercedes packag...

OEM Detroit / Freightliner One Box Pressure Sensor (SUR A4721530928)
$95.00
OEM Detroit / Freightliner One Box Pressure Sensor Part #: A4721530928 Fits 2016 and newer Detroit / Freightliner One Box Assemblies. (SUR A4721530928) This is not an aftermarket part, it is OEM. These units are OEM "take-offs", they are brand new and unused but do not come in retail Detroit / Mercedes packaging. We buy complete units from Detr...

OEM Detroit / Freightliner Exhaust Gas Temperature (EGT) sensor (A6805402117)
$40.00
OEM Detroit / Freightliner / Western Star Exhaust Gas Temperature Sensor (EGT) A6805402117 for OneBox assemblies. Fits 2016 and newer OneBox Aftertreatment systems. This is not an aftermarket part, it is OEM. These units are OEM "take-offs", they are brand new and unused but do not come in retail Detroit / Mercedes packaging. We buy complete un...

OEM Detroit / Freightliner Exhaust Gas Temperature (EGT) sensor (A6805401917)
$75.00
OEM Detroit / Freightliner / Western Star Exhaust Gas Temperature Sensor (EGT) A6805401917 for OneBox assemblies. Fits 2016 and newer OneBox Aftertreatment systems. This is not an aftermarket part, it is OEM. These units are OEM "take-offs", they are brand new and unused but do not come in retail Detroit / Mercedes packaging. We buy complete u...

Redline Emissions Products Replacement DPF for Detroit-Mercedes (A0014907692 / REP 54081)
$1,165.00
Redline Emissions Products 54081 OEM DPF Replacement for Detroit Mercedes DD13 / DD15 / DD16 "Detroit One Box" **EPA16 and newer**. For the prior (older) version see the REP 52976 OEM: A6804914194, A0014907692, RA0014907692, EA0014907692, RA6804914194 Uses G03001 gaskets (included) and VB2007 clamp & VB2008 clamp (not included) Our filters...

Redline Emissions Products Replacement Clamp for Detroit (A0009957033 / VB2042)
$54.85
Redline Emissions Products replacement for Detroit A0009957033 OEM 12.5" V-clamp VB2042. This clamp is an exact-fit replacement for the more expensive OEM one. Fits Detroit Single DPF versions of the "OneBox" Replaces OEM: A0009957033, A0009956733 Also available in kit REP VB3019

Redline Emissions Products Replacement Clamp for Detroit (A6809950501 / VB2043)
$112.95
Redline Emissions Products replacement for Detroit A0009957033 OEM 13.6" V-clamp VB2043. This clamp is an exact-fit replacement for the more expensive OEM one. Fits Detroit Single DPF versions of the "OneBox" Replaces OEM: A6809950501, A0039955101 Also available in kit REP VB3019
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- Everything in Freightliner One Box
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- DOC
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- OEM DPF/DOC
- OEM Surplus
- One Box
- Redline Emissions Products
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