DAYUAN Oxygen Sensor & Oil Pressure Sender Socket Set — 10-Piece Heat-Treated Chrome Vanadium Kit with Side Cutouts

DAYUAN’s 10-piece oxygen sensor and oil pressure sending unit socket set is a complete specialty-socket kit designed to remove and install O2 sensors, oil pressure senders, fuel injectors, and vacuum switches safely and efficiently.

This toolbox-ready kit gathers ten purpose-made sockets in a fitted blow-molded case so technicians and DIYers can tackle stubborn sensors without cutting wiring or damaging housings. Built from heat-treated chrome vanadium steel with a black oxide finish, each socket is sized and chamfered for common domestic and many international vehicle applications, and the organized case keeps everything accessible on the bench or in the trunk.

Which repairs does this socket set handle?

The DAYUAN set covers removal and installation of oxygen (O2) sensors, oil pressure sending units, some fuel injectors, and vacuum switches — parts that often sit in tight spaces or have wiring that must be preserved. Several sockets include side cutouts or hex flats to clear sensor wiring while you operate a ratchet or breaker bar.

• O2 sensor removal and installation without cutting wires
• Oil pressure sender and sensor fittings for many domestic vehicles
• Service on vacuum switches and certain fuel injector fittings
• Fits both 3/8" and 1/2" drive tools (ratchets or breaker bars)

How does the set adapt to different tools and drive sizes?

Sockets are supplied in both 3/8" and 1/2" square drive formats so you can use standard ratchets, breaker bars, and hand wrenches. The set is not rated for impact tools; use hand-drive tools to protect the sockets and threaded sensors.

• Includes 3/8" and 1/2" drive sockets to match common drives
• Designed for ratchet, breaker bar, or hand wrench use
• Not compatible with impact wrenches — hand tools only
• Compatible with O2 sensor thread chasers when installing new sensors (thread chaser not included)

What materials and features improve longevity and safety?

Sockets are forged from heat-treated chrome vanadium to resist wear, and a black oxide finish provides corrosion resistance for shop environments. Precision six- and twelve-point profiles reduce rounding on fasteners, while side cutouts prevent damage to sensor wiring.

• Heat-treated chrome vanadium steel construction for durability
• Black oxide finish resists rust and corrosion in storage and use
• 6-point and 12-point socket geometry for secure engagement
• Side cutouts on select sockets to protect sensor wires and tubes

What comes in the kit and how is it stored?

The kit includes ten distinct sockets sized for common sensor and sender applications and ships in a molded plastic case sized for secure storage and easy transport. The case has internal slots for each socket plus locking latches and a comfortable handle for workshop portability.

• Ten specialty sockets with specified sizes (22mm, 27mm, 28mm, 29mm, 7/8", 1", 1-1/16", and assorted drives and lengths)
• Plastic blow-molded case: 11.8 x 9.8 x 2.5 inches (29.9 x 24.9 x 6.3 cm)
• Locking latches and ergonomic handle for transport
• Clear internal layout to prevent lost pieces and speed job setup

Who is this for: the DAYUAN 10-piece socket set is aimed at professional mechanics, mobile technicians, and experienced DIYers who service domestic and select international vehicles. It’s especially useful for anyone who frequently replaces O2 sensors or oil pressure senders and needs specialty sockets that protect wiring and threaded components while fitting standard hand-drive tools.