Cummins - O-Ring Seal - 3910824
Free returns on all eligible orders
You have 30 days to request a return. All sale items are final sale.
The Cummins 3910824 is a genuine OEM O-ring seal used in selected Cummins diesel engine applications. Cummins identifies this part specifically as an O Ring Seal, and current official product references note primary use on Euro II Automotive 5.9 liter B engines.
Key Features
- Genuine Cummins OEM part
- Part number: 3910824
- Identified by Cummins as an O-ring seal
- Factory replacement sealing component for the correct Cummins application
- Commonly supplied as an individual service part.
Engine Compatibility
Commonly associated with selected Cummins 5.9L B-series diesel applications. Official Cummins product references specifically note primary use on Euro II Automotive 5.9 liter B engines.
Serial Number Fitment Notice
Fitment should always be confirmed by engine serial number (ESN) before ordering. Cummins directs users to check compatibility with their equipment by engine serial number when selecting this part.
When This Part Needs Replacement
Replace this O-ring when the original seal is flattened, hardened, cut, leaking, or no longer able to provide a dependable seal in the intended engine assembly.
Installation Notes
Confirm the exact application before installation and compare the new seal to the original part during service. Inspect the sealing groove and surrounding mating surfaces so the replacement is installed into a clean, properly supported assembly.
Alternate/Superseded Part Numbers
Current references identify this item as 3910824. Additional supersession or interchange details should be confirmed by engine serial number before interchangeability is assumed.
Parts Desk Insight
This O-ring is best matched by the Cummins part number and engine serial number. For 3910824, the key application reference is Euro II Automotive 5.9L B engines, so customers should confirm their engine details before ordering.
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.