Lisle Dual Drive Oxygen Sensor Wrench 12390 — 1/2" & 3/8" Drives, Slotted Head for Heat Shields

The Lisle 12390 Dual Drive Oxygen Sensor Wrench is a forged, heat-treated six-point tool with both 1/2" and 3/8" drives and a slotted body to remove and install oxygen sensors with heat shields and harness clearance.

This specialized wrench combines heavy-duty strength and practical geometry so you can remove stuck oxygen sensors and reinstall them quickly. Its dual-drive design lets you start with a 1/2" breaker bar for extra leverage, then switch to a 3/8" ratchet for faster turning once the sensor is loosened. A slotted side opens room for wiring harnesses, and the six-point forged head resists rounding when working under high torque.

How does the dual-drive design make sensor removal easier?

The two drive sizes give you controlled power for each stage of removal. Use the 1/2" drive to apply heavy-breaking torque on a seized sensor, then swap to the 3/8" drive for quicker, more precise rotation during removal and installation.

• 1/2" drive accepts a breaker bar for high leverage
• 3/8" drive fits standard ratchets for speed and control
• Switch between drives without changing tools

Will it fit oxygen sensors with a heat shield and wiring harness?

Yes — the wrench's slotted body is specifically shaped to clear heat shields and routing for sensor wires. The slot lets the tool slide over the sensor with the harness in place, avoiding damage and saving time.

• Slotted side provides wire-harness clearance
• Fits sensors recessed by heat shields
• Reduces need to remove nearby components

Is this wrench durable enough for high-torque jobs?

The Lisle 12390 is made from forged, heat-treated steel with a six-point head to resist rounding under heavy torque. Its robust construction tolerates the extra force applied when loosening corroded or over-torqued sensors.

• Forged and heat-treated steel construction
• Six-point design for secure engagement
• Built to withstand high-torque breaker-bar use

What are the tool's dimensions and how will it fit in my toolbox?

The wrench measures approximately 3.5 inches wide by 5.25 inches high with a 1.75-inch diameter socket area, compact enough for most toolboxes and easy to carry to the job. Its concise size still provides the leverage and clearance needed for tight engine-bay spaces.

• Overall width: 3.5 inches
• Height: 5.25 inches
• Socket diameter: 1.75 inches

Who is this for: Technicians, DIY mechanics, and fleet maintenance crews who regularly service exhaust sensors will benefit from this wrench’s combination of leverage, compact size, and harness-friendly slot. It’s suited for anyone needing a dependable, purpose-built tool to remove or install oxygen sensors without dismantling heat shields or risking sensor wiring damage.