ONAN 503-1533-03 PREHEAT HOSE - ONAN Genuine OEM Part
ONAN
- Payment methods
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- SKU:
 - ONAN 503-1533-03
 - MPN:
 - 503-1533-03
 - 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
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Customer Support
Our team is always ready to answer your questions and provide the best assistance.
Description
- Certified as a Genuine OEM ONAN component, ensuring perfect fit and compatibility with Cummins systems
 - Facilitates efficient preheating of engine components for improved cold-start reliability
 - Engineered for durability and consistent heat transfer under demanding conditions
 - Maintains power system efficiency, engine health, and long-term operation integrity
 
ONAN 503-1533-03 PREHEAT HOSE - Empowering Dependability Through Precision Engineering
This preheat hose serves as a vital link in your generator’s cold start process, enabling rapid engine warm-up and minimizing wear during low-temperature starts. Its robust design guarantees consistent thermal performance, securing your system’s uptime. Equip your Cummins generator with this essential part today and uphold uncompromised reliability in all conditions. Experience sustained power with genuine care.
Benefit Filled Feature
- Guaranteed original ONAN part with exact specifications for seamless installation
 - Constructed with high-grade materials to resist heat degradation and extend service life
 - Optimizes fuel economy by ensuring efficient engine warm-up cycles
 - Prevents premature engine wear which lowers maintenance costs over time
 - Enhances overall generator operational stability, especially during mission-critical backup power
 
Details
Category: Hoses
Product SKU: ONAN 503-1533-03
Our knowledgeable customer service team is always ready to assist you with detailed guidance to secure the perfect fit for your application. Reach out anytime through our help center to ensure the best purchase decision. We genuinely hope your acquisition leads to a flawless repair journey and long-lasting generator 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