Cummins - Molded Hose - 3866019
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You have 30 days to request a return. All sale items are final sale.
The Cummins 3866019 Molded Hose is an OEM replacement formed hose for Cummins engine applications that specify this exact part number. Molded hoses are shaped to follow the correct routing around engine components, helping maintain proper coolant or fluid flow without kinking, rubbing, or collapsing.
Key Features
- Genuine Cummins molded hose
- Pre-formed shape for correct routing
- Used where 3866019 is listed in the Cummins parts breakdown
- Helps replace aged, cracked, swollen, or leaking hose
- Designed for proper fit on the specified Cummins engine assembly
Engine Compatibility
Fits Cummins engine applications that call for molded hose 3866019. Confirm by engine serial number, hose location, and parts diagram before ordering.
Serial Number Fitment Notice
Cummins molded hoses can vary by engine model, cooling layout, hose bend, diameter, and connection location. Serial-number verification is required to confirm the correct hose.
When This Part Needs Replacement
Replace this hose if it is cracked, soft, swollen, leaking, oil-soaked, hardened, collapsed, or rubbing against nearby components. Molded hoses should also be inspected during cooling-system or engine service.
Installation Notes
Compare the new hose to the removed hose before installation. Check clamp condition, clean the hose necks, route the hose without twist or tension, and refill/bleed the system according to the service procedure.
Alternate/Superseded Part Numbers
- 3866019
Parts Desk Insight
Molded hoses are not best matched by length alone. The bend shape, inside diameter, and engine routing matter, so matching the Cummins part number and serial number is the safest way to avoid fitment issues.
Shipping: Ships same or next day for fast Canada wide shipping. ⚓
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 3–4 business days.
Special-order items: timeline confirmed after order.
Returns & warranty
Returns & Satisfaction Guarantee
We stand firmly behind the quality of every product we sell. Your confidence matters to us — and we back it with a straightforward 30-Day Satisfaction Guarantee.
If you are not fully satisfied, you may request a return within 30 days of delivery. All returns must receive pre-approval prior to being sent back. Unauthorized returns will not be accepted.
To qualify for a return:
Item must be in new, unused condition
Product must be in its original packaging
All parts, components, hardware, manuals, and accessories must be included
Packaging must be undamaged and suitable for resale
Important:
Electronics are strictly inspected. No returns on open-box electronics. Exceptions may apply only with prior written approval. Any electronic unit that has been installed, powered, activated, or altered may not be eligible for return.
We are serious about product integrity — and equally serious about taking care of our customers. If there is ever a product issue, contact us immediately so we can make it right.
For return authorization, please contact our support team before shipping anything back.