Advance Truck Parts USA Q21-6170-003 DEF quality sensor showing a full length diagonal perspective of the black tubular sensor assembly with a mounting head, center o-ring, and corrugated wire harness connector on a plain background

Advance Truck Parts USA branded studio close up perspective showcasing the black mounting head, upper dual tubes, center o-ring, and corrugated wire harness of the heavy-duty DEF quality sensor for Kenworth and Peterbilt commercial trucks

Advance Truck Parts USA branded studio angled perspective highlighting the rectangular metal base plate, bottom sensor module, black tubular body, and corrugated wire harness of the heavy-duty DEF quality sensor for commercial trucks

ATP Q21-6170-003 DEF Quality Sensor for Paccar Kenworth Peterbilt

Name: ATP Q21-6170-003 DEF Quality Sensor for Paccar Kenworth Peterbilt
Brand: Advance Truck Parts USA
SKU: W072221
Price: 239.95 USD
Availability: InStock

Advance Truck Parts USA

Price

$239.95

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Stock: 4

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Description

ATP Q21-6170-003 DEF Quality Sensor

The ATP Q21-6170-003 DEF Quality Sensor is a direct replacement for OEM Paccar DEF concentration sensors used in Kenworth and Peterbilt trucks. Designed to provide accurate Diesel Exhaust Fluid quality readings, this sensor helps maintain proper SCR system operation and emission compliance.

Features

Direct replacement for Q21-6170-003
Compatible with many Kenworth and Peterbilt applications
Accurate DEF concentration monitoring
Plug-and-play installation
Heavy-duty construction for commercial truck environments

Cross References

Q21-6170-003
Q21-6170-003K1T
Q21-6167-003K1T
Q21-6127-006K1T

Applications

Kenworth Trucks
Peterbilt Trucks
PACCAR SCR Emission Systems

Please verify part number and compatibility before ordering.

Shipping information

Fast Shipping & Local Pickup

Keeping your business moving is time-sensitive. We process
and ship orders quickly to keep your downtime to a minimum.

Same-Day Shipping Cutoffs

Monday – Friday: Order by 5:30 PM ET
Saturday: Order by 11:30 AM ET

Free Local Pickup

Location: Sunrise, Florida
Ready Time: Free 1-hour warehouse pickup for in-stock items.

Overnight & Weekend Delivery

Standard Overnight: Delivered on the next business day (Monday – Friday).
Friday Overnight Orders: Delivered on Monday by default.
Saturday Delivery: If you need your order delivered on Saturday, you must select a specific "Saturday Delivery" option at checkout (subject to carrier availability).

Live Shipping Rates: Our website provides live shipping rates. Simply add the item to your cart and enter your ZIP code to instantly view all available shipping options before completing your purchase.

Next-Business-Day Delivery: Next-business-day delivery is available on many items when an overnight shipping option is selected before our daily shipping cutoff. Saturday delivery must be selected separately when available.