Loading...

Cummins Wiring Harness 2018-2024: OEM 4377407

CUMMINS WIRING HARNESS 2018-2024: OEM 4377407

Shipping ICON

ORDERS PLACED BEFORE 3PM EST WILL SHIP SAME DAY

WARRANTY ICON

WARRANTY
1M MILES OR 1 YEAR

$185.00

AVAILABILITY IN STOCK
OEM NUMBER4377407
PART TYPEWiring Harness
BRANDCummins
ENGINE MAKECummins
ENGINE TYPE
YEAR2018-2024
PART NUMBER4377407-OE

PRODUCT DESCRIPTION

This is a Genuine New, Cummins Wiring Harness, Cummins part number 4377407-OE ( OEM Part Number 4377407 ).This part is primarily made for a Cummins , production years 2018-2024, and comes with a One Million Miles or One Year Warranty. For additional warranty info Click Here

OEM NUMBERS

Primary OEM4377407
Additional OEM4377407, A050L578

ADDITIONAL DETAILS

CONDITIONGenuine New
UPC / Barcode00840490554610
WEIGHT1.00 LBS

SHIPPING OPTIONS

Ship Weight : 1.00 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.

"This Product Doesn't Have a Core"


Built to support dependable electrical connectivity, the Cummins Wiring Harness 2018–2024 (OEM 4377407) helps link essential components across the engine and aftertreatment systems. Designed for consistent signal transmission, this harness plays a key role in maintaining proper system communication. Manufactured to meet OEM specifications, it ensures accurate fitment and reliable compatibility for the listed model years. Choosing the correct wiring harness helps keep your systems operating smoothly and efficiently.

FITMENT CHART

YEARMAKEENGINE(S)
2018Cummins
2019Cummins
2020Cummins
2021Cummins
2022Cummins
2023Cummins
2024Cummins

PEOPLE ALSO ASKS | BLOG(S)

Electrical connectivity is what keeps every modern diesel engine system working in sync. The Cummins wiring harness is responsible for linking sensors, control modules, and aftertreatment components into one organized network. By transmitting both power and data signals, this component ensures the engine control module (ECM) can monitor and manage system functions accurately.

  • Connects Sensors, Modules, and Components
    The harness acts as the central link between various electrical components, allowing signals and power to move efficiently throughout the system.
  • Ensures Stable Power and Data Transmission
    By grouping wires into a single assembly, it helps maintain consistent electrical flow and reduces the risk of connection issues or signal loss.
  • Supports Engine and Emissions System Control
    Accurate signal transmission allows the ECM to regulate fuel delivery, monitor sensors, and manage aftertreatment processes effectively.
  • Designed for Cummins Applications (2018–2024)
    Built to OEM 4377407 specifications, this wiring harness is engineered to integrate with Cummins engines and their factory-installed systems for proper fitment.
  • Built for Durability in Harsh Environments
    With protective coverings and secure connectors, the harness is designed to withstand heat, vibration, and exposure common in diesel engine compartments.

The wiring harness may not be visible once installed, but it plays a critical role in overall system reliability. In Cummins engines, a dependable harness ensures smooth communication between components, supports emissions control, and helps keep the engine operating consistently under demanding conditions.

Wiring harnesses serve as the backbone of a vehicle’s electrical system, connecting critical components like sensors, control modules, and actuators. Built with protective insulation and designed to handle tough environments, they are made for long-term durability. Still, their actual lifespan depends on how well they are maintained and the conditions they operate in.

  • In many cases, a wiring harness can last the entire life of the vehicle when operating under normal conditions.
  • High heat exposure, especially near the engine or exhaust, can cause insulation to degrade over time.
  • Constant vibration may lead to chafing or wear if the harness is not properly secured.
  • Moisture intrusion can cause corrosion in connectors and wiring, leading to electrical issues.
  • Exposure to oil, fuel, or road chemicals can weaken insulation and increase the risk of damage.
  • Improper routing or past repairs can create stress points that shorten the harness lifespan.

Although wiring harnesses are designed for longevity, environmental factors and wear can affect their durability. Routine inspection and proper protection from heat, moisture, and physical damage can help ensure reliable performance for years.

Damage can interrupt electrical flow and cause components to stop working properly.

Yes, it bundles and shields wires from heat, vibration, and external damage.

Yes, exposure to heat and movement can wear down insulation and connections.

Signs include frayed wires, exposed insulation, or electrical faults.

Cummins Wiring Harnesss

PRODUCT VIDEOS