Have any questions?
We're here to help Monday - Friday 8:00am - 10:30pm
Call us at: +1 (877) 795-0656
Speak to a REAL person.
Speak to a REAL person.
This Genuine PACCAR 1954664PRX outlet NOx sensor is built for select ISX12, ISX15, MX-13, and 6.7L applications, cataloged for 2011-2018.
Application notes: Outlet Sensor.
| Brand | PACCAR |
| Part Type | Nox Sensor |
| SKU | 1954664PRX |
| UPC | 700133AT |
| Weight | 1.0 lb |
| Year Range | 2011-2018 |
| Engine / Fitment | ISX12, ISX15, MX-13, and 6.7L |
| Application Part Type | NOx Sensor |
| Application Notes | Outlet Sensor |
| CORE CHARGE: | NO CORE CHARGE - contact us if you would like to sell your core. |
Not 100% sure it fits? Submit your details below and our team will verify compatibility before you order.
Fitment verifications are answered during business hours — typically within 15 minutes.
Add as much detail as possible for the fastest and most accurate verification. Photos help a lot.
We ship eligible orders the same business day, Monday through Friday, excluding major United States holidays.
Advanced Truck Parts ships eligible orders the same business day when placed during our shipping hours. We ship Monday through Friday, excluding major United States holidays, and process same-day shipments until 6:00 PM EST.
Next Day Air orders will also ship the same business day when the product qualifies for our same-day shipping guarantee. Some products may not qualify due to availability, product type, supplier timing, freight requirements, or other shipping limitations.
When a product does not qualify for same-day shipment, a visible notice will appear on the product page stating that the item is not eligible for our same-day shipping guarantee.
| Shipping Method | Estimated Transit Time |
|---|---|
| Small Package Saver | 3 to 7 business days* This method is only available for products under 10 pounds. The majority of products that qualify for free shipping will ship using this method. |
| Ground | 1 to 6 business days* Our house carrier is UPS, and the majority of packages will ship this way. Occasionally, packages may ship FedEx. |
| Second Day Air | 2 to 3 business days* For this option, please call in and speak to our sales department. |
| Next Day Air | 1 to 2 business days* Next Day Air orders will ship the same business day when the product qualifies for our same-day shipping guarantee. For this option, please call in and speak to our sales department. |
| Canada | 1 to 6 business days* Transit time can vary due to border customs. The carrier may also use the contact number provided if further information is required. |
| Large Package Rate | 3 to 5 business days* For residential deliveries, the carrier may use the contact number provided to schedule delivery. |
| Will Call | Customer Pick Up This option is available to all customers but must be requested over the phone. There is no shipping or handling charge for choosing Will Call. All customers picking up in person, regardless of billing location, will be required to pay North Carolina sales tax unless tax exemption papers are provided. |
*Advanced Truck Parts processes and ships eligible orders Monday through Friday, excluding major United States holidays. The majority of our orders ship from our North Carolina warehouse.
Freight/LTL shipping quotes are calculated based on delivery to commercial addresses. This means that the property must be commercially zoned and have official business hours of operations. If you do not have a business address and you have already purchased a Freight or Oversized item then we will contact you with an updated shipping charge that must be paid for delivery. If you have not purchased yet and would like a shipping quote to a non commercial address, we are more than happy to help!
When a Freight shipment arrives do not sign the delivery receipt before you have fully inspected the package and have marked down the exceptions and damages on the receipt if they apply. If a Freight shipment does arrive and is damaged, we can not help you if you did not sign for it as damaged and clearly note it on the delivery receipt.
Upon delivery of the shipment, if you do not have the ability and/or equipment to unload your product the freight carrier may ask if you would like to have them unload the product with a lift gate or other methods. Any additional services requested such as this may incur an additional fee charged to the customer by the freight carrier and Advanced Truck Parts is not responsible for such charges. The decision to accept these charges lies solely with the delivery recipient.
All Free Shipping items will ship either USPS or UPS and will have a 3 to 7 day transit time. For any products or promo codes that offer Free Shipping on orders or individual parts, the Free Shipping only applies to the contiguous 48 United States. For all other ship to locations, an accurate shipping quote must be calculated and paid. Free Shipping also does not apply to oversized or freight items unless specifically stated and a commercial zone address is required.
Applicable for Ground Shipments Only - Canada Customs requires Canadian recipients to pay applicable duties and taxes on each shipment entering Canada. These charges may include POST, GST, HST, duties and other taxes of goods. A brokerage fee may also be charged to process shipments and present the requisite customs paperwork to Canada Customs on the importer's behalf. In some cases, orders may be sent in multiple shipments and can incur additional brokerage charges imposed by Canada Customs.
The customer is responsible for brokerage fees, POST, GST, HST, duties and other taxes of goods that are imposed by shipping companies or Canada Customs. In the event the customer refuses to pay those fees, Advanced Truck Parts may be forced to abandon the product at the Canadian border. In that case, the customer will receive no refund back because the product will be lost.
*Note - No additional taxes or duties are due for Freight/LTL shipments.
At Advanced Truck Parts we are proud to provide international shipping! We have a very experienced team of people here to help our international customers receive their parts quickly and at very affordable rates!
If you are trying to place an order and our website says that we can not ship to your location please contact us at john@advancedtruckparts.com so that we can give you a custom shipping quote. Once you contact us at john@advancedtruckparts.com we will respond quickly with an accurate shipping quote as long as you provide a full physical address with postal code.
In some cases our website may quote and charge you the wrong amount for shipping and if this occurs you will be contacted for additional payment. While we do our best to have our website calculate accurate shipping quotes, in dealing with international shipments this is difficult and sometimes our team has to calculate the correct shipping rate manually.
International customers are responsible for any duties, taxes, custom charges or currency exchange fees that their shipment may incur during transit. In the case of a shipment being refused, all transit charges will be deducted from the customer’s refund.
In the event your product is damaged in transit please contact us at 1-877-795-0656 immediately. All damages must be reported within 24-48 hours of receiving your package. If a shipment arrives at your doorstep and is clearly damaged make sure to take pictures as these will help expedite the return process.
All warranty claims and damaged items claims need to be handled through Advanced Truck Parts. Do not contact the manufacturer of the product directly as they will not be able to assist you in receiving a new item. Please do not attempt to install the part as this will void any replacement options or claims.
You reserve the right to refuse a shipment should you change your mind and decide to return the product. Please contact us ahead of time if you plan to do this so we can set up the appropriate return information in the system.
If a shipment is refused upon delivery, then Advanced Truck Parts will deduct the cost of the return shipping from your refund in addition to the initial shipping charge. If the item is damaged upon arrival or defective then we will take full responsibility for the cost of shipping.
We are now shipping internationally! All shipping rates will be calculated, and thus, will vary depending on the shipping location. All shipping rates are calculated based the cost of both the shipping and handling required to send your item.
Once you have placed your order by purchasing an item, eligible orders will ship the same business day when placed during our shipping hours. Some packages may spend another 3 to 10 days in transit, or possibly longer in international shipping situations.
We cannot ship to PO Boxes!!! Before purchasing our item(s), please make sure that either (1) your Paypal account has a confirmed physical address, or (2) you personally supply us with a sufficient physical address to ship to.
It is our desire to always have every listed item actively in stock. Occasionally, due to high demand we may be temporarily out of stock on an item. If this happens you will be notified and given the option to either cancel for a full refund or wait for the part to come in, typically 3-14 days.
We take pride in having the best customer service! If you have any questions about currently listed items, please call us toll-free in the United States at 1-877-795-0656 from 8:00 am - 10:30 pm EST.
If you have any comments or questions about listed items, shipping, handling time, parts you would like to see listed or absolutely anything at all, please feel free to email us.
Your gays send me different parts number I need nox sensor for paccar. Your gays send me for cammins
Was exactly what I needed to solve my check engine light, great price and prompt shipping
I gave 4 star,because looks like sensor was installed, without plastic cap for sensor itself, otherwise work properly with no problem
I was in a serious crunch and needed a NOX sensor for my 2016 T680. These guys were the only ones who had the genuine OEM part available not even the Kenworth Dealerships had the part because it was on back order from PACCAR for the next 2 weeks at least due to production issues and covid. The part was not over priced, it was exactly what i needed in new non defective condition and got our truck back on the road. The service that I received was amazing they had the part to me the next morning after i ordered it.
Thank you for your feedback! We are very grateful to you.
Paccar NOx sensors measure nitrogen oxide levels in the exhaust so the SCR system can control dosing and verify emissions performance.
Failures cause SCR efficiency codes, warning lights, and power derates or inducements on many platforms.
Heat exposure, soot contamination, wiring damage, and connector corrosion commonly lead to faults.
Installation must avoid twisting the harness and should include verifying exhaust leaks and proper sensor placement.
A Paccar NOx sensor monitors exhaust gas composition upstream or downstream of the SCR catalyst to measure nitrogen oxide levels. Its purpose is closed-loop control of DEF dosing and validation of aftertreatment efficiency. Because the sensor influences emissions compliance strategies, faults often result in inducement or derate logic to force corrective service.
Common signs include SCR efficiency-related fault codes, warning lamps, and reduced power or inducement messages. Sensors can fail electrically, show slow response, or report implausible values due to contamination or heat damage. Harness faults near the exhaust are common because of heat and vibration, leading to intermittent communication errors. Exhaust leaks upstream can also skew readings and create false efficiency failures.
Inspect exhaust joints for leaks and correct them before installing a new sensor. Route and secure the harness away from heat sources and moving parts and ensure connector seals are intact. Install the sensor with correct torque and avoid contaminating the sensing tip. After installation, clear codes and verify sensor communication and readings stabilize during a full drive cycle. If faults return quickly, check for system issues such as DEF dosing problems or exhaust leaks rather than replacing the sensor again.
Important: Always verify fitment by part number before installation and follow OEM torque specifications.
Important Notice:
This information is provided for reference only.
Installation parameters and repair regulations may vary depending on the vehicle model.
Before installation, always verify the requirements specified by the vehicle manufacturer.
Incorrect installation may result in improper operation or failure of the unit.
PACCAR is a global leader behind premium truck brands, with strong engineering and customer support capabilities.
Kenworth, Peterbilt, and other PACCAR-supported platforms used in on-highway and vocational service.
Pro tip: Verify component specifications—PACCAR platforms have many configurable options that affect fitment.
Jared Gudger
As a fire department, we reached out to Advancedtruckparts.com for some parts. Once we realized their company was in our area, we visited them in person. All of the employees that we came across were very polite and extremely helpful....
ALEX
Jimmy in parts was exceptional. He went above and beyond to ensure I had the correct part when we needed a new Battery Box lid after ours was stolen! He found the best price possible for the part and made the transaction over the phone quick and easy. Their prices for the same products were lower than the ridiculous prices at dealers services places.
Charles Barksdale
My CPC unit was stolen and I ordered what was the wrong part and quickly order another. I called to return the first part and they caught my mistake and quickly stop payment and refunded my money!!! Excellent customer service and support!!!!
robert reese
LOOKED UP ON LINE SENT IN INFORMATION TO VERIFY AFTER 530 THINK RESPONCE WOULD BE NEXT MORNING BUT WAS PLEASANTLY SURPRISED THAT I GOT VERIFICATION IN 15 MIN AND PLACED ORDER . GREAT SERVICE !!!!
Ed & Juli Byrnes
This is Edward Byrnes with Impressed Mobile Services LLC, I just ordered a brake master cylinder hydro booster combo for my 97 step van, Bob was very helpful and the price very good. Thank you again for the help. PS the song I heard while waiting on hold ( which was not long ) is epic! That is the best “on hold” message I have ever heard.