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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 (21)
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...
OEM Detroit One Box / A6804903212

OEM Detroit One Box / A6804903212
$12,000.00
These OEM Detroit / Freightliner One Box assemblies, A6804903212 are brand NEW and have never been installed. Fits various 2016 and newer Freightliner and Western Star configurations. This part includes all temperature, NOx, pressure sensors, electronics, and BOTH DPFs. When purchasing from Freightliner dealers, these do no include the DPFs and...
OEM Detroit One Box / A0014909292

OEM Detroit One Box / A0014909292
$12,000.00
These OEM Detroit Mercedes One Box A0014909292 are brand NEW and have never been installed. Fits various 2016 and newer Freightliner and Western Star configurations. A0014909292 / A6804908756. This part includes all temperature, NOx, pressure sensors, electronics, and BOTH DPFs. When purchasing from Freightliner dealers, these do no include the ...
OEM Detroit One Box / A0024908092

OEM Detroit One Box / A0024908092
$12,000.00
These OEM Detroit Mercedes One Box A0024908092 are brand NEW and have never been installed. Fits various 2016 and newer Freightliner and Western Star configurations. This part includes all temperature, NOx, pressure sensors, electronics, and BOTH DPFs. When purchasing from Freightliner dealers, these do no include the DPFs and must be purchased ...
OEM Detroit One Box / A6804903412

OEM Detroit One Box / A6804903412
$12,000.00
These OEM Detroit Mercedes One Box A6804903412 are brand NEW and have never been installed. Fits various 2016 and newer Freightliner and Western Star configurations. This part includes all temperature, NOx, pressure sensors, electronics, and BOTH DPFs. When purchasing from Freightliner dealers, these do not include the DPFs and must be purchased...
OEM Detroit One Box / A6804903712

OEM Detroit One Box / A6804903712
$12,000.00
These OEM Detroit Mercedes One Box A6804903712 are brand NEW and have never been installed. Fits various 2016 and newer Freightliner and Western Star configurations. This part includes all temperature, NOx, pressure sensors, electronics, and BOTH DPFs. When purchasing from Freightliner dealers, these do no include the DPFs and must be purchased...

OEM Detroit-Mercedes DEF Doser A0001405539
$550.00
OEM Detroit-Mercedes Diesel Exhaust Fluid Doser for One Box applications. Part number A0001405539. The DEF doser / injector is where the urea is sprayed into the exhaust stream. This device controls the amount of DEF going into the SCR and is crucial to maintain the correct NOx efficiency. This product is sometimes referred to as a "metering uni...

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...

New Genuine OEM "Take-off" Detroit / Mercedes NOX Sensor (A0101531928)
$375.00
OEM DETROIT NOX SENSOR A0101531928 FOR ONE BOX 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 Detroit / Mercedes retail packaging. We buy complete units from Detroit / Mercedes and then break them down so that we can sell the pieces individually...

OEM DETROIT PARTICULATE MATTER SENSOR (A0101536028)
$180.00
Surplus OEM Detroit One Box Particulate Matter (PM) Sensor A0101536028. 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 Detroit / Mercedes and then break them down so that we can sell the pieces individual...
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 OEM "TAKE-OFF" DETROIT WIRING HARNESS (A9674403751)

New OEM "TAKE-OFF" DETROIT WIRING HARNESS (A9674403751)
$300.00
OEM DETROIT WIRING HARNESS A9674403751 FOR OEM DETROIT-MERCEDES ONE-BOX APPLICATIONS. OEM SURPLUS FITS 2016 and later 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 from Detroit / ...
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- Everything in Freightliner One Box
- Cascadia
- Century
- clearance
- Columbia
- Coronado
- DD13
- DD15
- DD16
- Detroit One Box
- Detroit-Diesel
- Detroit-Mercedes
- DOC
- DPF
- EGT
- Freightliner
- Heavy Duty
- Mercedes-Benz
- NOx
- OEM (ALL)
- OEM DPF/DOC
- OEM Surplus
- One Box
- SCR
- sensor
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- Western Star