DAYUAN O2 Oxygen Sensor Socket Set — 5-piece kit with 7/8" 6-point socket, thread chasers for M18 & M12

DAYUAN 5-piece O2 oxygen sensor socket set is a complete remover, installer and thread-repair kit built to remove oxygen sensors safely without damaging wires or threads.

If you service exhaust systems, the right tooling speeds jobs and protects delicate sensor leads. This DAYUAN kit bundles three purpose-built sockets plus two thread chasers and drive-ready fittings to handle tight clearances, seized sensors and stripped threads on a wide range of modern vehicles. Every piece is sized for common O2 sensors and engineered with side cutouts and long-reach profiles so you can work around heat shields, braces and tight manifolds.

How does this kit prevent wire and connector damage when removing an O2 sensor?

The sockets include side cutouts and slit openings that let the sensor harness exit the socket while you apply torque, so you don't bend or pinch the sensor cable. Using the correct socket profile keeps the sensor body supported and reduces twisting forces on the electrical lead.

• Side-cutout sockets allow cable clearance during removal
• 6-point 7/8" (22mm) opening fits sensor hexes securely
• Extra-deep broach socket reaches recessed sensors without stressing wires
• Low-profile crowfoot design fits tight spaces and protects connectors

What sizes and drive types are included, and which vehicles will they fit?

The set includes a mix of 3/8" and 1/2" drive pieces and thread chasers designed for the most common oxygen sensor threads. The 7/8" (22mm) 6-point opening matches standard hexagon sensor bodies; the thread chasers handle M18 x 1.5mm and M12 x 1.25mm sizes frequently used on passenger cars and light trucks.

• 1 × 3/8" drive extra-deep broach socket (3-1/8" long)
• 1 × 3/8" drive low-profile crowfoot socket (1-1/4" long)
• 1 × 1/2" drive offset crowfoot socket (1-15/16" long)
• 2 × thread chasers: M18 x 1.5mm and M12 x 1.25mm with 3/8" drive

How does the set help with seized or damaged sensor threads?

Alongside removal sockets, the kit supplies two thread chasers that clean and restore common sensor threads to allow proper reseating of new sensors. Cleaning the thread before installation reduces the risk of cross-threading or poor sealing when replacing the sensor.

• M18 and M12 chasers clear rust, carbon and damaged threads
• 3/8" drive chasers attach to a ratchet for controlled hand-turning
• Using the chasers preserves sensor mounting surfaces for a secure fit

Which accessories and workshop scenarios does this kit best serve?

This kit is built for DIY mechanics, mobile techs and professional shops that encounter a range of sensor locations—from exposed manifold sensors to hard-to-reach downstream and upstream positions. Its combination of deep, low-profile and offset sockets plus thread tools makes it adaptable for on-vehicle repairs, fleet maintenance, and roadside service calls.

• Works with ratchets, breaker bars and extensions via 3/8" and 1/2" drives
• Designed for both inline and recessed sensor placements
• Compact selection fits into tool chests or mobile service kits

Who is this for: Mechanics, home enthusiasts and service technicians who need reliable oxygen sensor removal and thread repair tools that protect sensor wiring and speed replacements. If you frequently replace O2 sensors, service exhaust components or perform emissions-related maintenance, this DAYUAN set supplies the sockets and chasers to tackle tight clearances, seized fittings and damaged threads without improvising or risking connector damage.