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Cummins ISL, Paccar PX9 DOC Inlet Catalyst 2014-2018: OEM 4353290

CUMMINS ISL, PACCAR PX9 DOC INLET CATALYST 2014-2018: OEM 4353290

Shipping ICON

ORDERS PLACED BEFORE 3PM EST WILL SHIP SAME DAY

WARRANTY ICON

WARRANTY
1M MILES OR 1 YEAR

$1,895.00

CORE CHARGE:

$500.00
iCORE DISCLAIMER: The CORE charge is a 30 day hold and will not be processed as long as the CORE is returned within 30 days. If you do not have a CORE or fail to return the CORE within 30 days, the CORE charge hold amount will be processed at that time.

AVAILABILITY IN STOCK
OEM NUMBER4353290
PART TYPEDOC Inlet Catalyst
BRANDTamerx Diesel Products
ENGINE MAKECummins
ENGINE TYPEISL, Paccar PX9
YEAR2014-2018
PART NUMBER102-0135RM-DOC
APPLICATION NOTESEPA13

PRODUCT DESCRIPTION

This is a Remanufactured Tamerx DOC Inlet Catalyst, Tamerx part number 102-0135RM-DOC ( OEM Part Number 4353290 ). All parts are proudly remanufactured in the U.S.A. to the highest of OEM standards, and improvements are often applied to the original design in the remanufacturing process. This part is primarily made for a Cummins ISL, Paccar PX9, production years 2014-2018, and comes with a One Million Miles or One Year Warranty. For additional warranty info Click Here

OEM NUMBERS

Primary OEM4353290
Additional OEM4353290, 4353290NX, 4353290RX, 5287269, 5287269NX, 5300781, 5300781NX, A047V491

ADDITIONAL DETAILS

CONDITIONRemanufactured
UPC / Barcode00840490556140
WEIGHT44.00 LBS

SHIPPING OPTIONS

Ship Weight : 44.00 LBS
UPS Ground, 2nd Day Air, Next Day Air

SHIPPING POLICY

Tamerx Diesel Products ships via UPS Ground. Next day air shipping can be arranged for a reasonable price of anywhere from $50.00 - $100.00 depending on the weight of the product and your location. We will do everything we can to make sure that you get the service you need. We understand how important it is to receive your order as quickly as possible.
In most cases Tamerx Diesel Products only needs one address, as long as your product is shipping to the same location as your billing information. In order to eliminate credit card fraud, your billing information must match the credit card you provide.

The terms, conditions, and details of our warranty vary from product to product. Specific warranty details can be found below.

Tamerx Diesel Products provides a replacement warranty on all of our parts. The duration and mileage limitations of the warranty vary by product and are specified on the product's detail page/item listing.

Please note that the warranty covers replacement of the part and the cost of shipping the replacement part to you only. It does not cover any shop, labor, towing, or any similar or related costs. This is not a "money back guarantee".

If you experience a problem with your part or it is not functioning properly, the correct warranty procedure is to call us at (510) 257-1777 (8:00 AM - 5:00 PM ET Monday through Friday). Be sure to have your order number and/or other relevant order information ready so we can easily locate your order and resolve your issue as quickly as possible. From that point, we will review with you any troubleshooting steps that may need to be taken and other areas or systems that can be checked to rule out external problems contributing to your part's issue. If a replacement is determined to be necessary, we will then arrange for your replacement part to ship out ASAP and issue any necessary return shipping labels and/or documents.

As is the case for the majority of the diesel products sold on Tamerx Diesel Products, your part's warranty is active as soon as you install it. In some other cases, warranty activation is contingent upon you sending us your core (i.e., your old part). Tamerx Diesel Products will provide you a return shipping label for parts that have a warranty with a core return condition. When we have received your core return, the part's warranty coverage begins. We reserve the right to void the product warranty if your core is not received within the allotted time, or if it isn't received at all. If the warranty for the diesel part you are purchasing has a core return requirement, it will be clearly noted on the product detail page/item listing.

What is a Core Charge?

A core charge (also called "core deposit") is similar to the deposit you might pay for a can or bottle of soda and is a standard requirement in the auto parts industry. For example, in many states, to promote recycling, you pay a deposit when you purchase a can of soda and receive your deposit back when you return the empty can. Many automotive parts have a core charge, or core price, that works in essentially the same way as a soda can deposit.

30 Day Core Charge Hold

You authorize Tamerx Diesel Products, to hold your credit card for the specified core charge amount and that you agree to return your core with 30 days of receiving the purchased part. When we have received your core return, the hold is released and the core charge payment is canceled.

The customer, or parts buyer, is responsible for any shipping costs associated with core returns unless otherwise specified in the product listing/detail page. Tamerx Diesel Products offers prepaid UPS shipping labels (SKU numbers UPS-CR1 and UPS-CR2) for use in returning your core that are available for purchase on our website during your shopping/order process.

The shipping label you will need to use for the core return is dependent upon what part you are purchasing. UPS-CR1 is good for cores weighing up to 20 pounds. UPS-CR2 is appropriate for shipping cores weighing 21 pounds or more. You must include enough information with the core return that clearly identifies it as a.) a Core Return, and b.) contains enough information we can use to clearly associate the core return with your order. Including a copy of the invoice or packing slip that came with the original shipment, clearly marked "Core Return", is ideal. Alternately, you can include a note marked as "Core Return" that includes your order number, full name and address, and phone number or other contact information. Failure to include this information with your returned core will most likely delay any due core credit being issued and/or delay any applicable warranty activation. Core returns need to be for the exact part purchased and cannot be damaged. Substituting another part in place of the part you have purchased is not acceptable.

All fluids must be drained.

If you have purchased a set or a parts package, you will need to return cores for all components of the set. For example, if you have purchaed a high pressure oil pump with an IPR valve, you will need to return both HPOP and IPR valve cores to receive proper credit. If you have purchased an EGR cooler/EGR valve package, your core return must consist of an EGR cooler core and an EGR valve core, or core credit will not be given.

Core Charges are often mandated by state legislature, and, as such, the actual core charge and taxes on the charge may vary depending on the state in which you buy your part. The Tamerx Diesel Products core charge presented to you online today with your item is representative of the most common core charge.


Power your aftertreatment system with the Cummins ISL, Paccar PX9 DOC Inlet Catalyst 2014–2018 (OEM 4353290). Designed for Cummins ISL and Paccar PX9 engines, this DOC inlet catalyst helps initiate the oxidation process, supporting efficient exhaust gas treatment before downstream emissions components. Manufactured to meet OEM specifications, it delivers precise fitment and dependable compatibility across the listed model years. Installing the correct DOC inlet catalyst helps maintain effective emissions control and reliable aftertreatment system performance.

FITMENT CHART

YEARMAKEENGINE(S)
2014Cummins ISL Paccar PX9
2015Cummins ISL Paccar PX9
2016Cummins ISL Paccar PX9
2017Cummins ISL Paccar PX9
2018Cummins ISL Paccar PX9

PEOPLE ALSO ASKS | BLOG(S)

The Cummins ISL, Paccar PX9 DOC Inlet Catalyst 2014-2018: OEM 4353290 is designed for the inlet section of the diesel oxidation catalyst (DOC) assembly. As one of the first components in the aftertreatment process, it helps prepare exhaust gases for the downstream emissions system while maintaining OEM compatibility for Cummins ISL and Paccar PX9 applications.

  • OEM 4353290 fits Cummins ISL and Paccar PX9 engines from 2014-2018
  • Installed at the inlet side of the diesel oxidation catalyst (DOC) system
  • Designed to integrate with the factory exhaust aftertreatment assembly
  • Precision-engineered to OEM specifications for proper fitment
  • Durable construction built for demanding commercial diesel applications
  • Direct replacement for worn or damaged DOC inlet catalyst units

The Cummins ISL, Paccar PX9 DOC Inlet Catalyst OEM 4353290 is a dependable replacement component for maintaining the original aftertreatment system configuration. Tamerx Diesel Parts offers quality OEM-fit diesel emissions components trusted by truck owners and technicians for reliable installation and long-term service.

 

Diagnosing a bad DOC inlet catalyst requires evaluating both the catalyst itself and the components that affect its performance. The Diesel Oxidation Catalyst (DOC) is responsible for reducing harmful exhaust gases and generating the heat needed for efficient DPF regeneration. When the DOC inlet catalyst is not functioning properly, it can lead to reduced emissions performance and problems throughout the aftertreatment system.

  • Begin by using a diagnostic scan tool to check for fault codes related to catalyst efficiency, exhaust temperature, or emissions performance.
  • Monitor live data from temperature sensors before and after the DOC to verify the catalyst is reaching and maintaining proper operating temperatures.
  • Inspect the DOC for signs of contamination from oil, coolant, or excessive soot that may reduce catalyst efficiency.
  • Check for exhaust leaks, damaged pipes, or loose clamps that could affect exhaust flow and sensor readings.
  • Evaluate DPF regeneration history, as frequent or failed regenerations may indicate reduced DOC performance.
  • Inspect related components such as fuel injectors, temperature sensors, and pressure sensors to rule out other causes of aftertreatment issues.
  • Measure exhaust backpressure if necessary to determine whether restrictions are affecting system operation.

Diagnosing a bad DOC inlet catalyst involves a combination of electronic diagnostics and physical inspection. Identifying the root cause early helps restore proper aftertreatment performance, improve regeneration efficiency, and prevent unnecessary replacement of other emissions system components.

Yes, a restricted DOC can increase exhaust backpressure and limit engine performance. This may also contribute to emissions-system warning lights.

Routine engine maintenance and prompt repair of fuel or turbocharger issues can reduce soot production. Regular inspections also help identify developing aftertreatment problems.

Yes, excessive engine oil entering the exhaust can contaminate the catalyst surface. This contamination may reduce its ability to treat exhaust gases effectively.

The DPF, exhaust temperature sensors, pressure sensors, turbocharger, and fuel system should all be inspected. Identifying the root cause helps prevent repeat failures.