Will it fit your vehicle?
This part is listed to suit:
- MakeCummins
- Engine6BT
Fitment listings are a guide. For a guaranteed match, send us your rego or VIN and our team will confirm the exact part before you pay.
6BT Rear Main Oil Seal Suits 4BT & 6BT – 3.9, 4.5, 5.9 & 6.7L Cummins 1989 – 2018
$104.00
In stock — order before 11am AEST for same-day shipping
6BT Rear Main Oil Seal Suits 4BT & 6BT – 3.9, 4.5, 5.9 & 6.7L Cummins 1989 – 2018 Cummins 6BT Rear Main Crankshaft Oil Seal With Steel Installer – 100% Brand New & High Quality.
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Willys Workshop · Oxley & Warana, QLD
Easy returns within 14 days
12 Month Warranty
Tuning & Fitment Available
Fast AU-Wide Shipping
Easy returns within 14 days
12 month warranty
Description
The 6BT Rear Main Oil Seal Suits 4BT & 6BT – 3.9, 4.5, 5.9 & 6.7L Cummins 1989 – 2018 is supplied new and genuine through Willys Workshop.
6BT Rear Main Oil Seal Suits 4BT & 6BT – 3.9, 4.5, 5.9 & 6.7L Cummins 1989 – 2018
Cummins 6BT Rear Main Crankshaft Oil Seal With Steel Installer – 100% Brand New & High Quality.
P/N 3925529 Suits Cummins 1989 And Up.
About Double Duty Diesel
Double Duty Diesel build heavy-duty engine internals and driveline components for Cummins, Duramax and Powerstroke platforms, engineered for towing, performance and competition duty cycles.
Fitment
Confirm your exact vehicle, engine and build date against the part number (DDDRMOS001) before ordering, or contact our team and we will check it for you.
Delivery
Live freight is calculated at checkout on your postcode, or contact us for a freight quote to your address before you order.
Fitting available at Willys Workshop, Oxley (Brisbane) and Warana (Sunshine Coast). Not sure it is the right part for your setup? Get in touch for a quote and fitment check.
Shipped Australia-Wide
- Dispatched from within Australia with tracking.
- Same-day dispatch on in-stock orders placed before 11am AEST, Monday–Friday.
- Shipping is calculated at checkout based on size, weight and your delivery address.
- Estimated delivery 2–7 business days depending on your location.
Freight question? Call us on (07) 5619 7869.
6BT Rear Main Oil Seal Suits 4BT & 6BT – 3.9, 4.5, 5.9 & 6.7L Cummins 1989 – 2018 Cummins 6BT Rear Main Crankshaft Oil Seal With Steel Installer – 100% Brand New & High Quality. P/N 3925529 Suits Cummins 1989 And Up.
Additional information
| Weight | 1.5 kg |
|---|---|
| Dimensions | 25 × 20 × 12 cm |
Double Duty Diesel — Manufacturer Pass-Through Warranty
Double Duty Diesel parts carry the original manufacturer's warranty:
- Fluidampr — Lifetime warranty on harmonic balancers
- MAHLE / Clevite — 12 months on bearings, gaskets, sealing components
- Dynomite Diesel — 12 months on stock-spec injectors and pumps; performance/race spec varies
- Power Driven Diesel — 12 months on turbos and bundled tuning kits
- Returns must be notified within 30 days of delivery
- Parts only — installation not covered
Workshop fitment available at Willys for transmissions, injectors and engine internals.
Read the full Double Duty Diesel warranty terms →
Warranty claims are coordinated through Willys Workshop. Email sales@willysworkshop.com.au or call Warana (07) 5619 7869 / Oxley (07) 3377 3421 with your order number and a description of the issue.
Questions, or need a fitment check?
Send your rego or VIN and our Australian-based team will manually confirm fitment before you buy.
Prefer to text your rego/VIN? 0485 885 957
