
Cummins N14 Jake Brake Assembly 2001-2006: OEM 3803370
CUMMINS N14 JAKE BRAKE ASSEMBLY 2001-2006: OEM 3803370

ORDERS PLACED BEFORE 3PM EST WILL SHIP SAME DAY

WARRANTY
1M MILES OR 1 YEAR
PRODUCT DESCRIPTION
This is a Remanufactured Tamerx Jake Brake Assembly, Tamerx part number 3803370RM ( OEM Part Number 3803370 ). 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 N14, production years 2001-2006, and comes with a One Million Miles or One Year Warranty. For additional warranty info Click Here
OEM NUMBERS
| Primary OEM | 3803370 |
| Additional OEM | 3072516, 3084530, 3803370 |
ADDITIONAL DETAILS
| CONDITION | Remanufactured |
| UPC / Barcode | 00840490550629 |
| WEIGHT | 45.00 LBS |
SHIPPING OPTIONS
Ship Weight : 45.00 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.
Serving as a key component in the engine braking system, the Cummins N14 Jake Brake Assembly 2001–2006 (OEM 3803370) is designed for compatibility with select Cummins N14 diesel engines. This assembly works by momentarily modifying valve operation to create engine braking, helping slow the vehicle without relying solely on the service brakes. Manufactured to meet original equipment specifications, it provides reliable fitment and consistent operation within the engine system. The unit is constructed with durable materials to handle the demanding conditions commonly experienced in heavy-duty diesel applications. Replacing a worn or malfunctioning unit with the OEM 3803370 Jake Brake Assembly helps maintain dependable engine braking functionality and supports better control during vehicle deceleration.
FITMENT CHART
| YEAR | MAKE | ENGINE(S) | ||||
|---|---|---|---|---|---|---|
| 2001 | Cummins | N14 | ||||
| 2002 | Cummins | N14 | ||||
| 2003 | Cummins | N14 | ||||
| 2004 | Cummins | N14 | ||||
| 2005 | Cummins | N14 | ||||
| 2006 | Cummins | N14 | ||||
PEOPLE ALSO ASKS | BLOG(S)
The Cummins N14 Jake Brake Assembly (OEM 3803370) is an essential component that helps provide engine braking in many Cummins N14 engines produced between 2001 and 2006. This system allows drivers to slow the vehicle using engine compression instead of relying solely on service brakes. Proper care and maintenance can help keep the Jake Brake assembly operating reliably and extend its service life.
Because this component works closely with the engine’s valvetrain and operates under constant mechanical stress, regular inspections and maintenance are important.
Tips for Maintaining Your Cummins N14 Jake Brake Assembly
- Follow routine engine maintenance schedules
- Regular oil changes and proper engine servicing help keep internal components clean and properly lubricated.
- Use high-quality engine oil
- Clean oil helps protect the Jake Brake mechanism and reduces wear on moving parts.
- Inspect valve lash and adjustments
- Proper valve and brake lash adjustments help ensure the Jake Brake functions correctly.
- Check electrical connections and wiring
- Loose or damaged wiring can interfere with the activation of the Jake Brake system.
- Listen for unusual sounds during operation
- Unusual noises may indicate worn components or adjustment issues that should be inspected.
Why Regular Care Matters
Properly maintaining the Cummins N14 Jake Brake Assembly OEM 3803370 helps ensure consistent engine braking and reduces strain on the vehicle’s service brakes. Routine inspections, correct adjustments, and regular engine maintenance can help extend the lifespan of this important engine braking component.
A Jake Brake assembly, also known as an engine brake, helps slow a diesel vehicle by releasing compressed air from the engine’s cylinders. When this system begins to fail, it may not provide the expected braking effect, which can make controlling speed on hills more difficult. Addressing the issue early can help prevent further engine complications.
One of the first steps is to confirm the problem through inspection or diagnostics. A technician can check the system for mechanical wear, electrical issues, or problems with related components that control the brake system.
If your Jake Brake assembly appears to be failing, consider the following steps:
- Listen for unusual noises
- when the engine brake is engaged
- Check for reduced braking effect
- while using the system
- Inspect electrical connections
- that control the brake activation
- Examine the valve components
- for wear or damage
- Replace worn or damaged parts
- within the assembly if needed
In some cases, the issue may involve related engine components rather than the brake assembly itself. Problems with valve operation, oil flow, or electronic controls can interfere with how the system functions.
Having the system inspected by a qualified technician can help identify the exact cause. Prompt repairs can restore proper engine braking and help maintain safe vehicle operation.
The assembly works with the engine’s valvetrain and control components to produce engine-based braking.
The assembly is mounted on the engine’s cylinder head area as part of the engine braking system.
Engine braking systems help slow the vehicle without relying only on the service brakes.
The system releases compressed air from the cylinders during the compression stroke to create resistance in the engine.




