Skip to product information
Usually ships in 2–4 business days.
New Access Hole Cover 3903463 For Cummins Engine 6B 4B 6C ISC Series
$22.99
Sale price
$22.99
Regular price
Available to Order
This Access Hole Cover is a high-quality aftermarket replacement part compatible with Cummins Engine 6B, 4B, 6C, and ISC Series and matches OEM Part# 3903463.
Not sure which part fits your equipment?
Our Northline Parts team can help you find the right replacement. Support Hours: Monday–Friday, 8:00 AM–5:00 PM CT | Live Chat: Available 24/7
I reached out for some replacement head bolts and they responded quickly with a few questions and cautionary information and is sending me some bolts. Great customer service! Thanks
Edward H. — Verified customer
Product Overview
This heavy-duty access hole cover is designed specifically for Cummins engine series to provide a secure seal and protect internal components. Engineered for durability, it helps maintain engine efficiency by preventing leaks and blocking debris from entering sensitive areas.
Key Features & Performance
- Reliable Sealing: Designed to provide a tight fit that prevents oil leakage and contamination.
- Durable Construction: Built from premium materials to handle the vibrations and heat of heavy-duty engine operation.
- Direct Replacement: Manufactured to match original dimensions for a seamless installation process.
Fitment & Compatibility
- Compatible Engines: Cummins 4B, 6B, 6C, and ISC Series
Technical Specifications
- Part Number(s): 3903463
- Item Type: Access Hole Cover
Frequently Asked Questions
Q: Does this part include mounting hardware? A: This listing includes the access hole cover only; original mounting hardware can typically be reused. Q: Is this part suitable for automotive applications? A: Yes, this cover is compatible with Cummins 4B, 6B, 6C, and ISC engines used in various automotive, industrial, and marine applications.
Compatibility may vary by serial number. Verify fitment before purchase.