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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.

  • 4254211C91 Genuine Navistar International 7 Gallon Def Tank Qls 1% Ssi Sensor Head Unit - ADVANCED TRUCK PARTS
    4254211C91 Genuine Navistar International 7 Gallon Def Tank Qls 1% Ssi Sensor Head Unit - ADVANCED TRUCK PARTS

    4254211C91 Genuine Navistar International 7 Gallon Def Tank Qls 1% Ssi Sensor Head Unit

    INTERNATIONAL
    $1,699.00
    $1,699.00 - $1,699.00
    $1,699.00
    $699.00
    $699.00 - $699.00
    $699.00
    Low stock

    Description: 7 Gallon Def Tank Qls 1% Ssi Sensor Head UnitCondition: NewPart Number: 4254211C91Brand: Navistar InternationalNavistar®

    $1,699.00
    $1,699.00 - $1,699.00
    $1,699.00
    $699.00
    $699.00 - $699.00
    $699.00
  • 2515990C1 Genuine Navistar International 5 Gallon Def Tank Qls Sensor Head Unit - ADVANCED TRUCK PARTS

    2515990C1 Genuine Navistar International 5 Gallon Def Tank Qls Sensor Head Unit

    INTERNATIONAL
    $699.00 - $699.00
    $699.00
    $699.00 - $699.00
    $699.00
    Low stock

    Description: 5 Gallon Def Tank Qls Sensor Head UnitCondition: NewPart Number: 2515990C1Brand: Navistar InternationalNavistar®

    $699.00 - $699.00
    $699.00
    $699.00 - $699.00
    $699.00
  • 2515990C2 Genuine Navistar International 5 Gallon Def Tank Qls Sensor Head Unit - ADVANCED TRUCK PARTS

    2515990C2 Genuine Navistar International 5 Gallon Def Tank Qls Sensor Head Unit

    INTERNATIONAL
    $699.00 - $699.00
    $699.00
    $699.00 - $699.00
    $699.00
    Low stock

    Description: 5 Gallon Def Tank Qls Sensor Head UnitCondition: NewBrand: Navistar InternationalPart Number: 2515990C2 Navistar®

    $699.00 - $699.00
    $699.00
    $699.00 - $699.00
    $699.00
  • 4254212C91 Genuine Navistar International 5 Gallon Def Tank Qls Sensor Head Unit - ADVANCED TRUCK PARTS

    4254212C91 Genuine Navistar International 5 Gallon Def Tank Qls Sensor Head Unit

    INTERNATIONAL
    $699.00 - $699.00
    $699.00
    $699.00 - $699.00
    $699.00
    Low stock

    Description:  5 Gallon Def Tank Qls Sensor Head UnitCondition: NewPart Number: 4254212C91 Brand: Navistar International Navistar®

    $699.00 - $699.00
    $699.00
    $699.00 - $699.00
    $699.00
  • 4097721C91 Genuine Navistar International 5 Gallon Def Tank Qls Sensor Head Unit - ADVANCED TRUCK PARTS
    4097721C91 Genuine Navistar International 5 Gallon Def Tank Qls Sensor Head Unit - ADVANCED TRUCK PARTS

    4097721C91 Genuine Navistar International 5 Gallon Def Tank Qls Sensor Head Unit

    INTERNATIONAL
    $699.00 - $699.00
    $699.00
    $699.00 - $699.00
    $699.00
    Low stock

    Description: 5 Gallon Def Tank Qls Sensor Head Unit Condition: NewPart Number: 4097721C91 Brand: Navistar InternationalNavistar®

    $699.00 - $699.00
    $699.00
    $699.00 - $699.00
    $699.00
  • 4163689C91 Genuine Navistar International 5 Gallon Def Tank Qls Sensor Head Unit - ADVANCED TRUCK PARTS

    4163689C91 Genuine Navistar International 5 Gallon Def Tank Qls Sensor Head Unit

    INTERNATIONAL
    $1,299.00
    $1,299.00 - $1,299.00
    $1,299.00
    $699.00
    $699.00 - $699.00
    $699.00
    Low stock

    Description:  5 Gallon Def Tank Qls Sensor Head Unit Condition: NewPart Number: 4163689C91Brand: Navistar International Navistar®

    $1,299.00
    $1,299.00 - $1,299.00
    $1,299.00
    $699.00
    $699.00 - $699.00
    $699.00
  • Ottawa Kalmar Def Quality Sensor 90035730 - ADVANCED TRUCK PARTS

    Ottawa Kalmar Def Quality Sensor 90035730

    PARKER CHELSA
    $1,299.00 - $1,299.00
    $1,299.00
    $1,299.00 - $1,299.00
    $1,299.00
    Low stock

    Description: QLS DEF ADBLUE quality sensor for Ottawa Kalmar Condition: NewBrand: Ottawa KalmarPart Number: OW90035846, 90035730, 90035846

    $1,299.00 - $1,299.00
    $1,299.00
    $1,299.00 - $1,299.00
    $1,299.00
  • Q21-6167-008K1T Paccar Def Quality Sensor Q21-6170-008K1T Q21-6127-004K1T - ADVANCED TRUCK PARTS
    Q21-6167-008K1T Paccar Def Quality Sensor Q21-6170-008K1T Q21-6127-004K1T - ADVANCED TRUCK PARTS

    Q21-6167-008K1T Paccar Def Quality Sensor Q21-6170-008K1T Q21-6127-004K1T

    PACCAR
    $985.00
    $985.00 - $985.00
    $985.00
    $199.00
    $199.00 - $199.00
    $199.00
    Low stock

    Description: Def Quality Sensor For Peterbilt Kenworth PaccarCondition: NewBrand: PaccarPart Number: Q21-6167-008k1tOther Oem Part Numbers That Wil...

    View full details
    $985.00
    $985.00 - $985.00
    $985.00
    $199.00
    $199.00 - $199.00
    $199.00
  • Remanufactured Q21-6167-005K1T Paccar Def Quality Sensor Q21-6170-005K1T Q21-6127-008K1T - ADVANCED TRUCK PARTS

    Remanufactured Q21-6167-005K1T Paccar Def Quality Sensor Q21-6170-005K1T Q21-6127-008K1T

    PACCAR
    $1,849.00 - $1,849.00
    $1,849.00
    $1,849.00 - $1,849.00
    $1,849.00
    Low stock

    Description: Def Quality Sensor For Peterbilt Kenworth Paccar Condition: Remanufactured Brand: Paccar Part Number: Q21-6170-005k1t Other Oem Part N...

    View full details
    $1,849.00 - $1,849.00
    $1,849.00
    $1,849.00 - $1,849.00
    $1,849.00
  • Q21-6167-007K1T Paccar Def Quality Sensor For Peterbilt Kenworth Paccar - ADVANCED TRUCK PARTS
    Q21-6167-007K1T Paccar Def Quality Sensor For Peterbilt Kenworth Paccar - ADVANCED TRUCK PARTS

    Q21-6167-007K1T Paccar Def Quality Sensor For Peterbilt Kenworth Paccar

    PACCAR
    $799.00 - $799.00
    $799.00
    $799.00 - $799.00
    $799.00
    Low stock

    Description: Def Quality Sensor For Peterbilt Kenworth Paccar Condition: New Brand: Paccar Part Number: Q21-6167-007K1T Other Oem Part Numbers That...

    View full details
    $799.00 - $799.00
    $799.00
    $799.00 - $799.00
    $799.00
  • Q21-6167-006K1T Q21-6170-006K1T Oem Paccar Def Quality Sensor - ADVANCED TRUCK PARTS

    Q21-6167-006K1T Q21-6170-006K1T Oem Paccar Def Quality Sensor

    PACCAR
    $999.00 - $999.00
    $999.00
    $999.00 - $999.00
    $999.00
    Low stock

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

    View full details
    $999.00 - $999.00
    $999.00
    $999.00 - $999.00
    $999.00
  • Q21-6167-005K1T Paccar Def Quality Sensor Q21-6170-005K1T Q21-6127-008K1T - ADVANCED TRUCK PARTS

    Q21-6167-005K1T Paccar Def Quality Sensor Q21-6170-005K1T Q21-6127-008K1T

    PACCAR
    $1,899.00 - $1,899.00
    $1,899.00
    $1,899.00 - $1,899.00
    $1,899.00
    Low stock

    Description: Def Quality Sensor For Peterbilt Kenworth Paccar Condition: New Brand: Paccar Part Number: Q21-6170-005k1t Other Oem Part Numbers That...

    View full details
    $1,899.00 - $1,899.00
    $1,899.00
    $1,899.00 - $1,899.00
    $1,899.00
  • Genuine Paccar Q21-1129 Def Level Sensor Kit Q21-6171-002 - ADVANCED TRUCK PARTS

    Q21-1129 Genuine Paccar Def Level Sensor Kit

    PACCAR
    $999.00 - $999.00
    $999.00
    $999.00 - $999.00
    $999.00
    Low stock

    Description: Def Level Sensor Kit Condition: NewBrand: Paccar Part Number: Q21-1129 Other Oem Part Numbers That Will Work: Q21-6171-002

    $999.00 - $999.00
    $999.00
    $999.00 - $999.00
    $999.00

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