DAYUAN Oxygen Sensor Socket Set 5-Piece — 22mm 3/8" & 1/2" Drives with Thread Chasers (M18 & M12)

DAYUAN 5Pcs O2 Oxygen Sensor Socket Set is a complete, wire-friendly tool kit for removing, installing and cleaning oxygen sensors and vacuum switches on most modern vehicles.

If you work on cars that use computer-controlled engine management, a reliable oxygen sensor socket set saves time and prevents damage. This five-piece DAYUAN kit combines deep and low-profile sockets, offset crowfoot access, and two thread chasers so you can extract stubborn sensors, access tight locations and restore damaged threads without cutting or splicing sensor wiring.

How does this set make oxygen sensor removal safer for wires?

Each socket in the kit features a side cutout that allows the sensor lead to pass through while the socket fully engages the hex flats. That means you rarely need to cut sensor wiring or stretch fragile leads when loosening or tightening a sensor.

• Side window design keeps wires clear of the socket body
• Allows use of ratchet or breaker bar without stressing the harness
• Reduces need to cut and re-crimp sensor connectors

Which sockets are included and what situations do they cover?

The kit includes three socket types plus two thread-chasing tools to cover most oxygen sensor locations and common thread damage. You get both deep and low-profile options for recessed sensors and offset crowfoot access for sensors blocked by nearby components.

• 6-point 7/8" (22mm) opening fits hex oxygen sensors
• 3/8" drive extra-deep broach socket reaches recessed sensors
• 3/8" low-profile and 1/2" offset crowfoot sockets access tight or obstructed positions
• M18 x 1.5 and M12 x 1.25 thread chasers clean and restore threads

Will this set work with my ratchet, breaker bar or torque tool?

Yes. The sockets include common 3/8" and 1/2" drive ends so they pair with standard hand tools. Use the 3/8" drive pieces with compact ratchets; swap to the 1/2" offset crowfoot for higher leverage with a breaker bar or torque wrench adapter when needed.

• 3/8" drive pieces for tight spaces and handheld ratchets
• 1/2" offset crowfoot for added leverage or torque tools
• 6-point socket reduces rounding risk during high-torque removal

How do the included thread chasers help after a seized sensor?

If an oxygen sensor seized or cross-threaded, the M18 and M12 chasers let you clean and re-cut mating threads before installing a new sensor. That helps ensure proper seating and prevents future leaks or premature sensor failure caused by poor engagement.

• Thread chasers match common sensor thread pitches M18×1.5 and M12×1.25
• 3/8" drive design lets you use a ratchet to control cutting speed and alignment
• Restores threads without needing to retap the cylinder head or exhaust fitting

Who is this for? The DAYUAN 5-piece O2 socket set is aimed at professional mechanics, mobile technicians and DIY enthusiasts who service modern fuel-injected engines. It’s especially useful if you frequently work in cramped engine bays, encounter seized or cross-threaded sensors, or prefer tools that protect sensor wiring and reduce installation time. The combination of deep, low-profile and offset sockets with thread chasers makes this kit a practical addition to any garage toolbox where oxygen sensor service is performed.