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DEF QUALITY SENSOR

The DEF (Diesel Exhaust Fluid) sensor plays a crucial role in the Selective Catalytic Reduction (SCR) system of heavy-duty trucks. It measures the level and quality of DEF in the storage tank and communicates this information to the engine control unit.

Customers should choose Advanced Truck Parts for their DEF sensor needs due to our commitment to quality and customer satisfaction. We offer a wide range of genuine DEF sensors for various heavy-duty truck makes and models, ensuring high-quality and reliable performance. Our experienced team provides expert guidance and support in selecting the right DEF sensor and addressing any technical inquiries. Moreover, we offer competitive pricing without compromising on quality, providing cost-effective solutions. With our comprehensive inventory, exceptional customer service, and dedication to delivering reliable DEF sensors, Advanced Truck Parts is the trusted choice for customers seeking accurate DEF level monitoring and optimal SCR system performance in their heavy-duty trucks.

  • Q21-6170-001K1T Genuine Paccar Def Quality Sensor

    PACCAR
    Original price $575.00
    Original price $575.00 - Original price $575.00
    Original price $575.00
    Current price $250.00
    $250.00 - $250.00
    Current price $250.00
    Out of stock

    Description: DEF Quality Sensor For Peterbilt Kenworth Paccar Condition: New Brand: Paccar Part Number: Q21-6170-001K1T Other OEM Part Numbers That...

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    Original price $575.00
    Original price $575.00 - Original price $575.00
    Original price $575.00
    Current price $250.00
    $250.00 - $250.00
    Current price $250.00
    Sold out
  • Dm501-2206A765 Genuine Spartan Motorhome Def Head Level Sensor For 10 Gallon

    ADVANCED TRUCK PARTS
    Original price $2,399.00 - Original price $2,399.00
    Original price
    $2,399.00
    $2,399.00 - $2,399.00
    Current price $2,399.00
    Out of stock

    Description: Def Head Level Sensor For 10 Gallon Tank Condition: NewBrand: Spartan Part Number: DM501-2206A765

    Original price $2,399.00 - Original price $2,399.00
    Original price
    $2,399.00
    $2,399.00 - $2,399.00
    Current price $2,399.00
    Sold out
  • 5012171R91 Genuine Navistar International 7 Gallon Def Tank Qls 1% Ssi Sensor Head Unit

    INTERNATIONAL
    Original price $1,699.00
    Original price $1,699.00 - Original price $1,699.00
    Original price $1,699.00
    Current price $699.00
    $699.00 - $699.00
    Current price $699.00
    Low stock

    Description: 7 Gallon Def Tank Qls 1% Ssi Sensor Head Unit Condition: NewPart Number: 5012171R91Brand: Navistar InternationalNavistar®

    Original price $1,699.00
    Original price $1,699.00 - Original price $1,699.00
    Original price $1,699.00
    Current price $699.00
    $699.00 - $699.00
    Current price $699.00
  • Ctt00026746 Ottawa® Tank Asm Def - With Head Assembly

    OTTAWA KALMAR
    Original price $2,399.00
    Original price $2,399.00 - Original price $2,399.00
    Original price $2,399.00
    Current price $1,899.00
    $1,899.00 - $1,899.00
    Current price $1,899.00
    Low stock

    Description: Tank ASM, DEF - With Head AssemblyCondition: NewBrand: Ottawa®Part Number: CTT00026746Other Oem Part Numbers That Will Work: CTT000227...

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    Original price $2,399.00
    Original price $2,399.00 - Original price $2,399.00
    Original price $2,399.00
    Current price $1,899.00
    $1,899.00 - $1,899.00
    Current price $1,899.00
  • 04-35164-000 Freightliner Def Header Quality Sensor Sending Unit

    FREIGHTLINER
    Original price $3,005.00
    Original price $3,005.00 - Original price $3,005.00
    Original price $3,005.00
    Current price $1,399.00
    $1,399.00 - $1,399.00
    Current price $1,399.00
    Low stock

    Description: Freightliner Def Header Quality Sensor Sending UnitCondition: New   Brand: Freightliner Part Number: 04-35164-000Other Oem Part Number...

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    Original price $3,005.00
    Original price $3,005.00 - Original price $3,005.00
    Original price $3,005.00
    Current price $1,399.00
    $1,399.00 - $1,399.00
    Current price $1,399.00
  • Q21-6172-K1T OEM Paccar DEF Level Sensor For Peterbilt Kenworth

    PACCAR
    Original price $1,499.00 - Original price $1,499.00
    Original price
    $1,499.00
    $1,499.00 - $1,499.00
    Current price $1,499.00
    Low stock

    Description: DEF Level Sensor For Peterbilt, KenworthCondition: NewBrand: PaccarPart Number: Q21-6172-K1TOther OEM Part Numbers That Will Work: Q21...

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    Original price $1,499.00 - Original price $1,499.00
    Original price
    $1,499.00
    $1,499.00 - $1,499.00
    Current price $1,499.00
  • 325-0150-18-K Genuine Generic DEF Sensor 18"

    Generic
    Original price $1,599.00 - Original price $1,599.00
    Original price
    $1,599.00
    $1,599.00 - $1,599.00
    Current price $1,599.00
    Low stock

    Description: DEF Sensor 18"Condition: NewBrand: Generic Part Number: 325-0150-18-K Other OEM Part Numbers That Will Work: 325-0086-18-K, 325008618K...

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    Original price $1,599.00 - Original price $1,599.00
    Original price
    $1,599.00
    $1,599.00 - $1,599.00
    Current price $1,599.00
  • 320/D9237 Genuine JCB QLS Def Sensor Head Unit

    JCB
    Original price $845.00 - Original price $845.00
    Original price
    $845.00
    $845.00 - $845.00
    Current price $845.00
    Out of stock

    Description: QLS Def Sensor Head UnitCondition: NewBrand: JCBPart Number: 320/D9237 Other OEM Part Numbers That Will Work: 320/D9237, 320/C9049, 32...

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    Original price $845.00 - Original price $845.00
    Original price
    $845.00
    $845.00 - $845.00
    Current price $845.00
    Sold out
  • 5012178R91 Genuine Navistar International 7 Gallon Def Tank Qls Sensor Fls 1 Head Unit

    INTERNATIONAL
    Original price $1,699.00
    Original price $1,699.00 - Original price $1,699.00
    Original price $1,699.00
    Current price $699.00
    $699.00 - $699.00
    Current price $699.00
    Low stock

    Description: 7 Gallon Def Tank Qls Sensor Fls 1 Head UnitCondition: New Brand: Navistar InternationalPart Number: 5012178R91Navistar®

    Original price $1,699.00
    Original price $1,699.00 - Original price $1,699.00
    Original price $1,699.00
    Current price $699.00
    $699.00 - $699.00
    Current price $699.00
  • 4086804C91 Genuine Navistar International 15 Gallon Def Tank Qls 1% Ssi Sensor Head Unit

    INTERNATIONAL
    Original price $899.00
    Original price $899.00 - Original price $899.00
    Original price $899.00
    Current price $399.00
    $399.00 - $399.00
    Current price $399.00
    Low stock

    Description: SENSOR, 15G, QLS 1% SSICondition: NewPart Number: 4086804C91Brand: Navistar International Navistar®

    Original price $899.00
    Original price $899.00 - Original price $899.00
    Original price $899.00
    Current price $399.00
    $399.00 - $399.00
    Current price $399.00
  • 5012174R91 Genuine Navistar International 15 Gallon Def Tank Qls 1% Ssi Sensor Head Unit

    INTERNATIONAL
    Original price $899.00
    Original price $899.00 - Original price $899.00
    Original price $899.00
    Current price $399.00
    $399.00 - $399.00
    Current price $399.00
    Low stock

    Description: SENSOR, 15G, QLS 1% SSICondition: NewPart Number: 5012174R91Brand: Navistar International Navistar®

    Original price $899.00
    Original price $899.00 - Original price $899.00
    Original price $899.00
    Current price $399.00
    $399.00 - $399.00
    Current price $399.00
  • 4097724C91 Genuine Navistar International 12 Gallon Def Tank Qls Sensor Head Unit

    INTERNATIONAL
    Original price $699.00 - Original price $699.00
    Original price
    $699.00
    $699.00 - $699.00
    Current price $699.00
    Low stock

    Description: 12 Gallon DEF Tank QLS Sensor Head Unit Condition: NewPart Number: 4097724C91Brand: Navistar International

    Original price $699.00 - Original price $699.00
    Original price
    $699.00
    $699.00 - $699.00
    Current price $699.00
  • 4163692C91 Genuine Navistar International 9.5 Gallon Def Tank Qls Sensor Head Unit

    INTERNATIONAL
    Original price $699.00 - Original price $699.00
    Original price
    $699.00
    $699.00 - $699.00
    Current price $699.00
    Low stock

    Description: SENSOR, 9.5 GALLON, QLS WITH COVER   Condition: NewBrand: Navistar InternationalPart Number: 4163692C91Navistar®

    Original price $699.00 - Original price $699.00
    Original price
    $699.00
    $699.00 - $699.00
    Current price $699.00
  • Q21-6170-007K1T Paccar Def Quality Sensor For Peterbilt Kenworth Paccar

    PACCAR
    Original price $799.00 - Original price $799.00
    Original price
    $799.00
    $799.00 - $799.00
    Current price $799.00
    Low stock

    Description: Def Quality Sensor For Peterbilt Kenworth Paccar Condition: New Brand: Paccar Part Number: Q21-6170-007K1T  Other Oem Part Numbers Tha...

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    Original price $799.00 - Original price $799.00
    Original price
    $799.00
    $799.00 - $799.00
    Current price $799.00
  • Q21-6167-006K1T Q21-6170-006K1T Remanufactured Paccar Def Quality Sensor

    PACCAR
    Original price $999.00 - Original price $999.00
    Original price
    $999.00
    $999.00 - $999.00
    Current price $999.00
    Low stock

    Description: Def Quality Sensor For Peterbilt Kenworth Paccar Condition: Remanufactured Brand: Paccar Part Number: Q21-6170-006k1t Other Oem Part N...

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    Original price $999.00 - Original price $999.00
    Original price
    $999.00
    $999.00 - $999.00
    Current price $999.00
  • Q21-6170-004K1T Oem Paccar® New Def Quality Sensor

    PACCAR
    Original price $399.00 - Original price $399.00
    Original price
    $399.00
    $399.00 - $399.00
    Current price $399.00
    Low stock

    Description: Def Quality Sensor For Peterbilt Kenworth PaccarCondition: NewBrand: PaccarPart Number: Q21-6170-004k1t, Q21-6127-007k1tOther Oem Part...

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    Original price $399.00 - Original price $399.00
    Original price
    $399.00
    $399.00 - $399.00
    Current price $399.00
  • Q21-6168-001K1T Paccar Def Quantity Sensor Level

    PACCAR
    Original price $999.00 - Original price $999.00
    Original price
    $999.00
    $999.00 - $999.00
    Current price $999.00
    Low stock

    Description: Sensor -Def LevelCondition: NewBrand: PaccarPart Number: Q21-6168-001k1tOther Oem Part Numbers That Will Work: Q21-6171-001k1t, Q21-61...

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    Original price $999.00 - Original price $999.00
    Original price
    $999.00
    $999.00 - $999.00
    Current price $999.00
  • 325015022 Genuine Generic DEF Sensor Kit 22"

    Generic
    Original price $1,499.00 - Original price $1,499.00
    Original price
    $1,499.00
    $1,499.00 - $1,499.00
    Current price $1,499.00
    In stock

    Description: DEF Sensor Kit 22"Condition: NewBrand: Generic Part Number: 325015022Other OEM Part Numbers That Will Work: 325015022K, 325-0150-22, 3...

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    Original price $1,499.00 - Original price $1,499.00
    Original price
    $1,499.00
    $1,499.00 - $1,499.00
    Current price $1,499.00
  • 325-0150-22 Genuine Generic DEF Sensor Kit 22"

    Generic
    Original price $1,499.00 - Original price $1,499.00
    Original price
    $1,499.00
    $1,499.00 - $1,499.00
    Current price $1,499.00
    In stock

    Description: DEF Sensor Kit 22"Condition: NewBrand: Generic Part Number: 325-0150-22Other OEM Part Numbers That Will Work: 325015022K, 325-0150-22,...

    View full details
    Original price $1,499.00 - Original price $1,499.00
    Original price
    $1,499.00
    $1,499.00 - $1,499.00
    Current price $1,499.00
  • 325015022K Genuine Generic DEF Sensor Kit 22"

    Generic
    Original price $1,499.00 - Original price $1,499.00
    Original price
    $1,499.00
    $1,499.00 - $1,499.00
    Current price $1,499.00
    In stock

    Description: DEF Sensor Kit 22"Condition: NewBrand: Generic Part Number: 325015022KOther OEM Part Numbers That Will Work: 325015022K, 325-0150-22, ...

    View full details
    Original price $1,499.00 - Original price $1,499.00
    Original price
    $1,499.00
    $1,499.00 - $1,499.00
    Current price $1,499.00
  • 325015018K Genuine Generic DEF Sensor 18"

    Generic
    Original price $1,599.00 - Original price $1,599.00
    Original price
    $1,599.00
    $1,599.00 - $1,599.00
    Current price $1,599.00
    Low stock

    Description: DEF Sensor 18"Condition: NewBrand: Generic Part Number: 325015018KOther OEM Part Numbers That Will Work: 325-0086-18-K, 325008618K, 32...

    View full details
    Original price $1,599.00 - Original price $1,599.00
    Original price
    $1,599.00
    $1,599.00 - $1,599.00
    Current price $1,599.00
  • 325008618K Genuine Generic DEF Sensor 18"

    Generic
    Original price $1,599.00 - Original price $1,599.00
    Original price
    $1,599.00
    $1,599.00 - $1,599.00
    Current price $1,599.00
    Low stock

    Description: DEF Sensor 18"Condition: NewBrand: Generic Part Number: 325008618KOther OEM Part Numbers That Will Work: 325-0086-18-K, 325008618K, 32...

    View full details
    Original price $1,599.00 - Original price $1,599.00
    Original price
    $1,599.00
    $1,599.00 - $1,599.00
    Current price $1,599.00
  • 325-0086-18-K Genuine Generic DEF Sensor 18"

    Generic
    Original price $1,599.00 - Original price $1,599.00
    Original price
    $1,599.00
    $1,599.00 - $1,599.00
    Current price $1,599.00
    Low stock

    Description: DEF Sensor 18"Condition: NewBrand: Generic Part Number: 325-0086-18-KOther OEM Part Numbers That Will Work: 325-0086-18-K, 325008618K,...

    View full details
    Original price $1,599.00 - Original price $1,599.00
    Original price
    $1,599.00
    $1,599.00 - $1,599.00
    Current price $1,599.00
  • 4099716C91 Genuine Navistar International® 9.5 Gallon Def Tank Qls Sensor Head Unit

    INTERNATIONAL
    Original price $1,299.00 - Original price $1,299.00
    Original price
    $1,299.00
    $1,299.00 - $1,299.00
    Current price $1,299.00
    Low stock

    Description: 9.5 Gallon DEF Tank QLS Sensor Head Unit Condition: NewBrand: International Part Number: 4099716C91Other Oem Part Numbers That Will Wo...

    View full details
    Original price $1,299.00 - Original price $1,299.00
    Original price
    $1,299.00
    $1,299.00 - $1,299.00
    Current price $1,299.00

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