ONAN 503-1921 LOWER ENGINE HOSE - ONAN Genuine OEM Part
ONAN
- Payment methods
-
- SKU:
- ONAN 503-1921
- MPN:
- 503-1921
- Condition:
- New
- Availability:
- Ships (leaves our warehouse) within next business day if in stock
- Shipping:
- View Shipping Rates


Available Inventory
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Competitive Pricing
Enjoy competitive rates and great deals on every order.
Customer Support
Our team is always ready to answer your questions and provide the best assistance.
Description
- Precisely engineered Genuine ONAN OEM replacement part
- Seamlessly channels coolant through the lower engine pathways to maintain optimal temperature
- Constructed to withstand high-pressure, high-temperature operating environments
- Maintain the dependable operation your Cummins/Onan system demands
ONAN 503-1921 LOWER ENGINE HOSE - Performance in Every Connection, Trust in Every Flow
The ONAN 503-1921 Lower Engine Hose plays a critical role in regulating the engine's cooling system, helping prevent overheating and ensuring consistent power output. Designed to match the exacting specifications of Onan generators, this component supports durable engine health and efficient operation. Upgrade your equipment with this genuine part and protect your investment with superior reliability and fit. Secure this essential component and experience peace of mind in every run.
Benefit bringing confidence and durability to your engine
- Manufactured by ONAN to meet strict OEM standards for maximum compatibility
- Engineered for resistance to heat, pressure, and coolant contaminants, ensuring long service life
- Maintains optimal engine temperature regulation to improve fuel economy and reduce emissions
- Designed for easy installation and continued system integrity under demanding conditions
Details
Category: Hoses
Product SKU: ONAN 503-1921
Our customer support team is dedicated to guiding you through your purchase with expertise and care. Should you need any assistance, our help center is readily available to ensure your buying experience is smooth and informed. We are passionate about helping you achieve the best repair possible, granting your engine the parts it deserves for lasting performance.
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