Dorman Oxygen Sensor Bung

Fix a Damaged O2 Sensor Bung Without Replacing the Whole Exhaust

A corroded, stripped, or otherwise damaged oxygen sensor bung is one of those frustrating exhaust repairs that seems like it should be simple — but it can quickly escalate into replacing an entire pipe or manifold section if you don't have the right hardware. Dorman tackles this problem head-on with its line of oxygen sensor bung repair kits, giving mechanics and DIYers a cost-effective, permanent solution that saves the original exhaust component.

Dorman's Oxygen Sensor Bung Lineup

Dorman's oxygen sensor bung assortment spans four distinct part numbers, each engineered to cover a specific installation scenario. The lineup includes both carbon steel and stainless steel versions, in standard and stepped profiles, with an additional curved-body option for tight or angled exhaust locations. All bungs use the industry-standard 18mm x 1.5mm thread pitch, making them compatible with virtually every modern oxygen sensor on the market.

• 917-109 – Carbon steel, 18mm x 1.5mm standard profile
• 917-112 – Carbon steel, 18mm x 1.5mm stepped profile
• 917-110 – Stainless steel, 18mm standard profile
• 917-113 – Stainless steel, 18mm stepped profile

The stepped design variants are particularly useful when welding into thicker-walled exhaust tubing, as the step seats flush against the pipe wall for a cleaner, more secure weld bead. The stainless steel options offer added corrosion resistance for vehicles in high-moisture or salt-belt environments, while the carbon steel versions are optimized for a clean, fast weld with standard MIG or TIG equipment.

Why Dorman for Oxygen Sensor Bungs?

Dorman's repair-friendly approach means the bung allows replacement of a damaged fitting without replacing the entire exhaust component. Installation is weld-on, making it a permanent repair that requires no additional hardware. This philosophy reflects Dorman's long history in the automotive aftermarket — the company has been in the industry since 1918 — with a focus on innovation that addresses issues other manufacturers overlook.

Why replace an entire exhaust pipe because of a corroded, stripped, or damaged oxygen sensor bung? Save the pipe and replace the bung with this weld-on replacement. Standard O2 sensor threads ensure a universal fit, making these bungs perfect for repairs or custom installations alike.

For shops and home garages dealing with high-mileage vehicles where exhaust bung threads have seen years of heat cycling and corrosion, Dorman's kits offer a practical middle ground: Dorman parts are typically more affordable than OEM parts, making them an attractive option for those looking to save money without sacrificing quality. The weld-on design also makes these bungs ideal for custom exhaust fabrication where a fresh bung position is needed from scratch.

A Trusted Name in Exhaust Hardware

Among aftermarket brands, Dorman stands out as a popular choice for its innovative solutions. When it comes to straightforward exhaust hardware like oxygen sensor bungs — where the geometry and material quality matter most — Dorman's consistent thread spec and choice of carbon steel or stainless steel gives technicians confidence in the weld outcome and long-term sealing performance. Browse the full oxygen sensor bung category to find the right profile and material for your application, or explore the complete Dorman catalog for exhaust and emissions repair solutions.