Cummins 3957070 — Genuine Engine Oil Dipstick Tube (Oil Gauge Tube) for ISB 5.9L

MPN: 3957070  |  Also Known As: oil gauge tube, dipstick tube

Genuine Cummins replacement dipstick tube that restores accurate oil level readings and a proper seal at the block. Direct-fit for 2003–2007 Ram 5.9L ISB. Pair with OE dipstick 3959009 if needed.

Features & Benefits

• OE geometry for accurate dipstick depth and reading.
• Direct-fit replacement for factory routing and clip points.
• Corrosion-resistant construction to handle road salt and moisture.
• Prevents leaks when properly seated and sealed at the block.
• Backed by Cummins manufacturing standards for durability.

Verified Fitment (Automotive)

Retailer and catalog listings consistently show 3957070 as the OE dipstick tube for 2003–2007 5.9L Ram applications. We align to this coverage for automotive fitment. :contentReference[oaicite:0]{index=0}

Industrial/Off-Highway: Cummins indicates this tube is used primarily on EPA13-era 6.7L ISB/QSB engines; verify by ESN for industrial or late-model service parts overlap. :contentReference[oaicite:1]{index=1}

Specifications

• Type: Engine oil dipstick tube (oil gauge tube)
• OE Part Number: 3957070
• Quantity Required: 1 per engine (sold individually)

Often Paired With

• Engine Oil Dipstick: Cummins 3959009 (2003–2007 5.9L)
• Fresh oil & filter: good practice if contamination was present
• Routing hardware/clips: reuse or replace as needed for proper tube support

What’s In The Box

• (1) Genuine Cummins Engine Oil Dipstick Tube (3957070)
• Dipstick and hardware sold separately.

Installation Tips

• Lightly lube the tube end; seat fully in the block and verify seal.
• Route through factory clips/brackets; avoid kinks and abrasion points.
• Insert dipstick and confirm the reading matches service manual capacity after oil change.

FAQ

WILL THIS FIT MY 2003–2007 5.9L CUMMINS RAM?

Yes—3957070 is listed for 2003–2007 Ram 2500/3500 with the 5.9L ISB common-rail. Always confirm by VIN/ESN. :contentReference[oaicite:3]{index=3}

DOES THIS INCLUDE THE DIPSTICK?

No—this listing is the tube only. The matching OE dipstick is Cummins 3959009 (sold separately). :contentReference[oaicite:4]{index=4}

WHAT ABOUT 6.7L APPLICATIONS?

Cummins notes 3957070 is used primarily on EPA13-era 6.7L ISB/QSB engines on the industrial/parts side. For trucks, confirm by VIN/ESN as most 6.7L Rams use different tubes. :contentReference[oaicite:5]{index=5}

HOW DO I KNOW MY TUBE NEEDS REPLACED?

Cracks, corrosion, loose fit at the block, or a bent tube that causes incorrect readings are common reasons to replace.

IS THIS A GENUINE CUMMINS PART?

Yes—OE Cummins 3957070.