CUMMINS 3905801 OEM OIL GAUGE TUBE (DIPSTICK TUBE) – RAM 5.9L 12V (1994–1998)

Product Description

The CUMMINS 3905801 OEM OIL GAUGE TUBE (DIPSTICK TUBE) is the genuine dipstick tube used on many 1994–1998 Dodge Ram 2500/3500 5.9L 12-valve Cummins applications. Built to Cummins factory specs, this tube restores proper oil level routing and helps ensure your engine gets accurate oil readings under load, towing, and daily driving. If your original tube is rusted, bent, cracked, or leaking at the block, replacing it with a real Cummins 3905801 is the right move for reliability and clean installation.

This tube is also commonly used across Cummins B-Series (4B3.9 / B5.9 / 6B5.9) and related industrial/Euro II platforms. Always confirm by VIN or engine serial number (ESN) when working on non-automotive equipment.

Fitment

• 1994–1998 Dodge Ram 2500 / 3500 with 5.9L 12-Valve Cummins (6BT)
• Many B-Series 5.9L applications using 3905801 tube (verify by ESN)
• Designed to work with the correct Cummins dipstick and hardware for accurate readings

Often Paired With (Cummins-Only)

For a complete, leak-free dipstick system on your 5.9L 12-valve, CPP Diesel also stocks these matching Cummins components:

• CUMMINS 3905802 OEM OIL GAUGE TUBE END – RAM 5.9L 12V (1994–1998)
• CUMMINS 3923016 OEM CLIP – OIL LEVEL (DIPSTICK) TUBE – RAM 5.9L 12V (1994–1998)
• CUMMINS 3923128 OEM ENGINE OIL DIPSTICK – 5.9L 12-VALVE (1996–1998)
• CUMMINS 3928740 OEM ENGINE OIL DIPSTICK – 5.9L 12-VALVE (1994–1995)
• CUMMINS 3905799 OEM OIL GAUGE TUBE (DIPSTICK TUBE) – RAM 5.9L (1989–1998)
• CUMMINS 5269589 OEM OIL GAUGE TUBE (DIPSTICK TUBE) – 5.9L 6BT (1989–1998)

Why Choose Genuine Cummins 3905801?

• OE bends, diameter, and flare for proper alignment and sealing at the block
• Helps maintain factory-correct oil level calibration when paired with the right dipstick
• Corrosion-resistant steel tube built for harsh under-hood conditions
• Direct-fit replacement – no universal “close enough” guesswork

What’s In The Box

• (1) Genuine Cummins 3905801 Oil Gauge Tube (Dipstick Tube)
• Tube end, retaining clip, and dipstick sold separately (see “Often Paired With” above)

Install Tips

• Inspect the block opening and sealing area; clean any rust or debris before installing the new tube.
• Seat the tube fully and confirm the dipstick travels freely without binding.
• After installation, warm the engine, park on level ground, and verify the oil level is within the proper range.
• Always match tube and dipstick part numbers for the correct model year to keep readings accurate.

FAQ

Will this Cummins 3905801 tube fit my 1994–1998 5.9L 12-valve Ram?

Yes, this is the OE-style dipstick tube used on many 1994–1998 Dodge Ram 2500/3500 trucks with the 5.9L 12-valve Cummins. Always verify fitment by VIN or engine serial number if components have been changed.

Does this 3905801 tube include the tube end, clip, or dipstick?

No. Part 3905801 is the tube itself. Order the matching tube end (3905802), clip (3923016), and the correct dipstick (3928740 for ’94–’95 or 3923128 for ’96–’98) separately if needed.

Can I use this tube on other Cummins B-Series engines?

3905801 is cataloged on various B-Series 5.9L applications, including certain industrial/Euro II engines. Always confirm by ESN and compare your existing tube before ordering for non-Ram applications.

How do I know when my dipstick tube needs to be replaced?

Common signs include rust-through, oil leaks at the block, cracked or kinked tubing, or inconsistent oil readings even after verified service. If you see these issues, a new genuine Cummins tube is recommended.

Is this a genuine Cummins part or an aftermarket copy?

This listing is for a genuine Cummins 3905801 oil gauge tube sourced through CPP Diesel – not a universal or off-brand replacement.

Specifications for cummins 3905801