Tools for testing and replacing spark plugs
When replacing a spark plug, you need special tools to do the job easily. Spark plugs are usually screwed in deeply, which means that an ordinary hex cap will not give you enough grip. A spark plug cap offers the solution because these are usually longer and have rubber in the cap which keeps the spark plug firmly in place when installing or removing the spark plug. There are different sizes of spark plugs hence there are also different spark plug wrenches from 8 to 21 mm. Below you will also find various tools to test a spark plug and to repair the threads.
In short, here you will find all the tools to independently replace and test a spark plug.

CUSTOR 3/8" spark plug socket set 10-piece with rubber holder
Complete 10-piece CUSTOR spark plug socket set with rubber holder for safe installation and removal of spark plugs and glow plugs.

LASER spark plug socket 16mm with 3/8" drive and thin wall
High-quality 16mm spark plug socket with 3/8" drive and thin wall, ideal for BMW engines.

CUSTOR 1/2" spark plug socket 16 mm with rubber holder
Durable 16 mm spark plug socket with 1/2" drive and rubber holder for safe spark plug installation.

CUSTOR 1/2" spark plug socket 21 mm with rubber holder
Professional 1/2" spark plug socket 21 mm with rubber holder for safe installation and removal of spark plugs.

DELTACH spark plug thread repair kit M14x1.25 17-piece
Easily restore damaged spark plug threads with this complete 17-piece set from DELTACH.

KS-TOOLS 3/8" 6-piece spark plug socket set with universal joint
Professional 6-piece spark plug socket set with universal joint for hard-to-reach glow plugs.

BGS TECHNIC Spark Plug Thread Repair Kit M14x1.25 for efficient thread repair
Repair damaged spark plug threads with precision and ease thanks to the BGS TECHNIC Spark Plug Thread Repair Kit M14x1.25.

FACOM 1/2" spark plug socket 16 mm with rubber holder
Professional 16 mm spark plug socket with rubber holder for safe installation and removal of spark plugs.

FACOM 1/2" spark plug socket 18 mm with rubber holding system
Professional 1/2" 18 mm spark plug socket with rubber holding system for safe installation and removal of spark plugs.

FACOM 3/8" spark plug socket 14 mm with rubber holder
Professional 3/8" 14 mm spark plug socket with rubber holder for safe installation and removal of spark plugs.

FACOM 3/8" spark plug socket 16 mm long with rubber holder
Professional 3/8" 16 mm spark plug socket with rubber holder for safe installation and removal of spark plugs.

FACOM spark plug socket 16mm with rubber holder
Durable 16mm socket with rubber holder and removable pin for efficient spark plug work.

FACOM spark plug socket 16 mm with rubber holder
Durable 16 mm socket with rubber holder and removable pin for efficient spark plug installation.

FACOM spark plug socket 21 mm with rubber holding system
Robust 21 mm FACOM socket with rubber holding system and removable pin for efficient spark plug installation.

FACOM spark plug socket 21 mm with rubber holder
Efficient 21 mm spark plug socket with rubber holder and removable pin for optimal installation and removal.

LASER 3/8" spark plug socket with universal joint 14mm for BMW
Professional 14mm spark plug socket with universal joint, ideal for hard-to-reach spark plugs in BMW models.

FACOM 3/8" spark plug socket with universal joint 8 mm for glow plugs
Professional 3/8" spark plug socket with universal joint and 8 mm head for precise installation and removal of glow plugs.

LASER glow plug wrench set 18-piece with special holders
Complete 18-piece glow plug wrench set with special holders and protective covers for various car brands.

FACOM flexible spark plug installation wrench 316 mm
Flexible 316 mm installation wrench for easily installing all types of spark plugs, even in hard-to-reach places.

SINATEC 3-piece brush set with soft-grip handles
Compact 3-piece brush set with soft-grip handles for precise cleaning of various materials.

SW-STAHL spark plug wrench with T-handle 16 mm universal joint
16 mm spark plug wrench with T-handle and universal joint for hard-to-reach places.

ELORA spark plug brush with brass wire for delicate cleaning
Clean your spark plugs effectively and gently with the ELORA spark plug brush made of brass wire.

XPTOOLS Glow Plug Removal Set 16-piece for M8 and M10 thread
Complete set for safely removing and repairing glow plugs with M8 and M10 thread.

DRAPER spark plug ignition tester with inspection tunnel
Quickly and accurately detect spark plug ignition faults with the DRAPER spark plug ignition tester.

BGS TECHNIC spark plug wrench with T-handle and universal joint 21 mm
Efficient 21 mm spark plug wrench with T-handle and universal joint for hard-to-reach spark plugs.

LASER 3/8" spark plug socket set with T-handle and universal head
Four-piece spark plug socket set with T-handle and universal head for easy removal of spark plugs in tight spaces.

Gunson Colortune Adapter 10mm for Spark Plug Tester
With the Gunson G4055A adapter, you can use your 14mm Colortune or Hi-Gauge compression tester on engines with 10mm spark plugs.

KS-TOOLS 3/8" spark plug socket set for Ford EcoBoost engines, 14 and 16 mm, 2-piece
Specially designed spark plug socket set for efficient maintenance of Ford EcoBoost 1.0 and 1.5 liter engines.

FACOM 1/2" spark plug socket 21mm with rubber holder, 250mm long
Professional 1/2" 21mm spark plug socket with rubber holder and 250mm length for safe and efficient spark plug installation.

Gunson Colortune Adapter 12mm for Spark Plug Tester G4055B
With the Gunson G4055B adapter you can use your 14mm Colortune or Hi-Gauge on 12mm spark plugs.

BGS TECHNIC 3/8" 14 mm twelve-point spark plug socket with rubber stop
Precision spark plug socket with rubber stop for safe installation and removal of 14 mm spark plugs.

BGS TECHNIC 3/8" 12-point spark plug socket 16 mm extra thin-walled
Precision spark plug socket with 12-point design and rubber holder for safe installation and removal of 16 mm spark plugs.

BGS TECHNIC 3/8" 10mm twelve-point spark plug socket 18mm with rubber stopper
Precision spark plug socket for safe installation and removal of 18 mm spark plugs, ideal for delicate platinum electrodes.