ONAN 503-1920 RADIATOR UPPER HOSE - ONAN Genuine OEM Part
ONAN
- Payment methods
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- SKU:
- ONAN 503-1920
- MPN:
- 503-1920
- Condition:
- New
- Availability:
- Ships (leaves our warehouse) within next business day if in stock


Available Inventory
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Competitive Pricing
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Customer Support
Our team is always ready to answer your questions and provide the best assistance.
Description
- Genuine ONAN OEM replacement part for guaranteed compatibility and quality
- Efficiently transfers coolant between the radiator and engine to maintain ideal operating temperature
- Designed for superior heat resistance and long-lasting service in demanding generator applications
- Protect your investment with parts engineered specifically for Cummins/Onan power systems
ONAN 503-1920 RADIATOR UPPER HOSE - Delivering trusted cooling performance with ONAN’s exacting standards
The ONAN 503-1920 Radiator Upper Hose plays a crucial role in your generator’s cooling system, ensuring coolant flows efficiently to prevent engine overheating. This genuine OEM part fits precisely, helping maintain engine health and extend equipment life. Secure this essential component today and optimize your generator’s dependability and fuel economy. Protect your system with parts designed for peak performance.
Feature that inspires confidence and reliability
- Original ONAN part guarantees seamless integration and preservation of warranty coverage
- Constructed to withstand high temperatures and pressure for uninterrupted generator operation
- Minimizes risk of leaks or failures that could cause costly downtime
- Engineered to support emissions control and noise reduction for cleaner, quieter power
- Backed by Cummins/Onan’s legacy of innovation and rigorous testing standards
Details
Category: Radiator Hoses
Product SKU: ONAN 503-1920
Our knowledgeable customer care team stands ready to provide expert guidance for your purchase, ensuring you find the right part for your generator needs. Reach out anytime through our help center—your satisfaction and successful repair are our highest priorities. We deeply appreciate your trust and are committed to supporting your power equipment’s long-term reliability.
Returns Information
You may return new, non-used, and unopened items within 30 days of delivery date under a 20% re-stocking fee in case you do not need it anymore or you have ordered a wrong item.
We cannot accept any returns on "Pumps, Motors, Electrical Items & Transmissions" whether the product is used or new, however in rare cases we may allow an exception under a 40% re-stocking fee.
If you need to return an item, please go to our chat located in the lower right corner, select the option “Returns” and follow the steps to submit your request. Please have on your hands pictures of the item, they will be requested. You will shortly receive an answer from our Customer Service Team providing authorization and return instructions. Likewise, if an exception cannot be authorized, you will receive an answer from us. No returns will be accepted in our warehouse without an RMA number (Return Merchandise Authorization).
All return shipping costs are on customer's responsibility and will not be refundable.
Returns are inspected once they arrive. If the inspection determines that the items are used, non-resellable condition, or damaged, the return will be denied and the customer will be contacted to ship the parts back at the customers' request and cost.
Cancellations
You may cancel your order, in whole or in part, only if the part is backordered and it isn't ready to ship. Once an order has been shipped, sent from the supplier to our warehouse, or in the dispatch line, we cannot cancel it. If your order is shipped, you will need to follow our return policy to return the items you no longer want.
If you need to cancel an order or item for any reason, you may submit a cancellation request directly through your account to the "more options" section or contact us by live chat. All the cancellation requests are evaluated before its approval. If you submit a cancellation request out of business hours, on a weekend or holiday, it will be processed on the next available business day.
Please allow for the cancellation to be confirmed, and check your account for updates on the status. The cancellation process usually takes 24-48 hours to be confirmed by email. We will process your cancellation request and issue a refund to your original payment method.
In the event that an item becomes no longer available (NLA), we will cancel it from your order and ship the remaining items to you. We will send you an email notification if we cancel any part of your order.
Some products may contain chemicals known to the State of California to cause cancer or reproductive harm. ⚠️ WARNING: www.P65Warnings.ca.gov