Pay in 4 interest-free payments
Coaster BB20 BB21 BB31 BB40 4cyl 3B Diesel Rear Main Crankshaft Oil Seal
Description:
Rear main oil seal replacement for Coaster BB20/BB21/BB31/BB40 with 3B Diesel/4cyl motors; helps prevent oil leaks and maintains crankcase integrity. Suitable for maintenance and repair to restore sealing performance and engine cleanliness.
Features:
- Designed for Isuzu Coaster BB series
- Fits 3B Diesel and 4cyl engines
- Replaces worn seal to stop oil leaks and protect bearings
Includes:
- 1 x Rear Main Crankshaft Oil Seal
Fits Models:
Isuzu Coaster BB20 BB21 BB31 BB40
Submodels:
BB20 BB21 BB31 BB40
Engine Options:
3B Diesel, 4cyl
Keywords:
rear main seal, crankshaft seal, Coaster, BB20, BB21, BB31, BB40, 3B Diesel, 4cyl, engine repair, auto parts
Rear Main Crankshaft Oil Seal for Coaster BB20 BB21 BB31 BB40 4cyl 3B Diesel
Shipping Information
Most orders land in 5–12 business days. We'll keep you updated at every step of the journey.
The Kren Bits journey:
- Order received — Day 0
- With fulfilment — Day 1–2
- Heading to courier — Day 2–4
- Shipped — Day 3–7
- Almost there — Day 5–10
- Delivered — Day 5–14
Where your part ships from:
Your order ships from the closest warehouse with available stock across our six-warehouse network — NZ, AU, TH, UK, US, and CN.
We email you at every real milestone — order received, with fulfilment, heading to courier, shipped, almost there, delivered. No chasing, no vague waits.
For more details, visit our Track Your Order page.
Product Enquiry
Got a question about this product? Need to check fitment for your vehicle? Fill in the form below and we'll get back to you within 24 hours.