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


Available Inventory
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Competitive Pricing
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Customer Support
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Description
- Certified Genuine ONAN OEM Part designed for precise compatibility
- Ensures optimal engine preheating for reliable starts in cold conditions
- Enhances fuel efficiency and engine longevity through efficient heat transfer
- Maintain superior Cummins/Onan system reliability and safety
ONAN 503-1533-03 PREHEAT HOSE - Powering Trust with Precision Engineering
This essential ONAN 503-1533-03 Preheat Hose plays a critical role in preparing your generator engine for smooth starts even under challenging temperature conditions. Engineered to meet rigorous Cummins standards, this component directly supports your system’s operational readiness. Secure this genuine part now to uphold consistent generator performance and long-term durability. Maintain superior Cummins/Onan system reliability and safety.
Benefit driven feature for peace of mind
- Authentic ONAN manufacturing guarantees direct fit and function
- Designed for optimal thermal conductivity to support rapid engine warming
- Durable construction resists wear and prevents failures in demanding environments
- Preserves manufacturer warranty by using original Cummins/Onan parts
- Contributes to smooth generator operation, reducing downtime and maintenance costs
Details
Category: Hoses
Product SKU: ONAN 503-1533-03
We are committed to providing expert guidance to help you select the right replacement part for your Cummins or Onan generator. Our knowledgeable team is available via the help center to assist with any questions, ensuring your purchase is hassle-free and dependable. We genuinely wish you success in your repair and power system maintenance journey.
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