10 Best M12 Glow Plug Reamer of 2025

Tested and Reviewed: Top 10 M12 Glow Plug Reamer deals with expert ratings from 8.1 to a perfect 10

March 2026 Edition

Editor's Choice

9.7

BGS

BGS 138-2 | Glow Plug Reamer M12 x 94 mm

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Editor's bottom line:

“This m12 glow plug reamer is the best one we tested. In terms of quality, brand and price, we couldn't ask for more.”

Main Highlights

made of chrome molybdenum steel
for professional cleaning of the glow plug manhole
cleaning of the manhole is recommended before installation of new glow plug
easy cleaning of the manhole
M12 x 1.25.reamer 6.9 mm

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9.5

BGS

BGS 138-1 | Glow Plug Reamer M12 x 59 mm

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Main Highlights

made of chrome molybdenum steel
for professiol cleaning of the glow plug manhole
cleaning of the manhole is recommended before installation of new glow plug
easy cleaning of the manhole
M12 x 1.25.reamer 6.9 mm

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9.5

Laser

Laser 5154 Glow Plug Reamer Set 3pc

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Main Highlights

Sizes: M10 x 10, M12 x 125 (short), M12 x 125 (long)
For removing engine carbon deposits
Manufactured from chrome molybdenum with titanium coating

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9.2

Unifizz

Glow Plug Puller Reamer Set, Glow Plug Removal Tool, Glow Plug Extractor Puller & Reamer Removal Tool Kit Accessory Replacement for Vehicles

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Main Highlights

Applicable for Benz Vehicles: M10 Reamers (2.1/2.2/2.7/3.2CDI, Smart R660 - OM611/612/613); M12 Reamers (2.0/2.2D, 2.5D/TD, 3.0D/TD - OM604/605/606); Electrical plug extractor - OM611/612/613
Convenient and Reliable: Remove stubborn glow plugs with melting electrodes effortlessly. Stable performance and perfect replacement for old or damaged accessories
High-Quality Material: Made of heavy-duty metal to prevent rust and ensure durability. Can withstand hard work and provide long service life
Precision Manufacturing: Professionally manufactured with excellent quality. Improve work efficiency and provide a better auto repair experience
Dimensions: Glow Plug Puller - Approx. 9mm/0.35"; Reamer for 8mm Glow Plug - 6xM10x1.5p; Reamer for 10mm/12mm Glow Plug - 7.3xM12x1.75p

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9.0

BGS

BGS Glow Plug Bore Reamer Set | 4 pcs. | M10 x 1.00, 107mm, M10 x 1.25, 137mm, M12 x 1.25, 59mm, 94mm | Chrome Molybdenum, Titanium Coated

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Main Highlights

For cleaning / rubbing out the glow plug hole
Cleaning is recommended before inserting the new glow plug
Suitable for a variety of engines from Audi, Alfa Romeo, BMW, Fiat, Nissan, Opel, Peugeot, Renault, Toyota, etc.
Includes 4 reamers in the following sizes: M10 x 1.00, length 107 mm, M10 x 1.25, length 137 mm, M12 x 1.25, length 59 mm, M12 x 1.25, length 94 mm
Material: chrome molybdenum, titanium coated

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8.8

AB Tools

AB Tools Glow Plug Reamer Cleaner Set M8 M10 and M12 for Cleaning Shafts and Seats

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Main Highlights

Professional glow plug reamer set
Suitable for cleaning glow plug shafts prior to fitting
Suitable for M8, M10 and M12 reamers
Comes with a T bar ratchet for ease of use
Depth stop for accurate measurements

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8.6

PENTASOO

PENTASOO GM-52074, EN-52074 Glow Plug Bore Reamer Compatible with Duramax 6.6L 3.0L 2.8L Engines, l5p Glow Plug Reamer Replacement for Glow Plug Reaming Tool

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Main Highlights

Efficient & Safe CleaningThe glow plug bore reamer is designed for all models of the duramax 6.6L, this en-52074 glow plug reamer effectively removes carbon and soot buildup from glow plug holes. The hex on gm-52074 is turned with a ratchet to remove any carbon build-up, which remains in the grease on the end of gm-52074 to be removed from the engine.
Wide CompatibilityThe glow plug reamer is compatible with 6.6L/3.0L/2.8L Duramax engines. Replaces part numbers: GM-52074, Kent-Moore EN-52074, otc-7223. Matches EN-52074s action for all 6.6 L Duramax engines (2001present).
Superior DurabilityThis gm-52074 glow plug bore cleaner tool is crafted from heat-treated alloy steel, maintaining exceptional hardness and wear resistance even after repeated use. It effortlessly cuts through stubborn deposits without chipping or dulling, making it ideal for professional maintenance or multi-vehicle DIY scenarios.
Saves TimeRecommends using a small amount of grease on the flutes to collect any carbon that is removed from the bore. Simply turn this tool by hand. No need to use a wrench or socket. Using the gm-52074 glow plug bore reamer enables thorough carbon buildup removal within minutes, significantly boosting repair efficiency.
Prevent Engine DamageProper cleaning is essential to prevent glow plug tip breakage during installation, which can lead to severe engine damageincluding harm to the piston, valves, and cylinder headif debris falls into the combustion chamber.Effectively captures debris with grease-applied flutes, preventing harmful particles from entering the combustion chamberits mandatory to ensure a safe and reliable installation.

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8.3

BGS

BGS 138-3 | Glow Plug Reamer M10 x 107 mm

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Main Highlights

Materials: Cotton material-cotton, can provide a comfortable protective layer.
Advantage: Fashion Design-Unisex black, stylish design. It protects you while making you look very stylish and beautiful.
Practicality: Washable and reusable.
Usage For: Suitable for cycling, camping, running, traveling, climbing and daily use.

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8.1

Boxonly

Boxonly Diesel Glow Plug Puller & Reamer Kit – Electrode Extractor & Thread Repair Tool for 10mm Glow Plugs – Fits Select Diesel Engine Applications

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Main Highlights

Broad Compatibility Designed for diesel engines: Mercedes OM611 (20002006), OM612 (19992006), OM613 (20002005), OM604/605/606, and Smart R660 (19992007).
Precision Tool Set Includes a 9mm plug puller, M10x1.5 reamer (6mm), and M12x1.75 reamer (7.3mm) for effective extraction and thread restoration.
Heavy-Duty Construction Made from strong, corrosion-resistant steel alloy, this set ensures reliable performance under high-torque engine repair conditions.
Safe Removal & Reaming Helps remove melted or stuck glow plugs while protecting cylinder threads during maintenance or part replacement.
Complete Kit with Storage Includes all components in a durable box for easy storage and transport. Ideal for workshops, garages, and DIY repairs.

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8.1

PENTASOO

PENTASOO EN-52074 - Glow Plug Bore Reamer Fit for Duramax 6.6L 3.0L 2.8L Engines, l5p Glow Plug Reamer Compatible with GM-52074 Glow Plug Reamer Tool

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Main Highlights

Efficient & Safe CleaningThe glow plug bore reamer is designed for all models of the duramax 6.6L, this en52074 glow plug reamer effectively removes carbon and soot buildup from glow plug holes. The hex on GM-52074 is turned with a ratchet to remove any carbon build-up, which remains in the grease on the end of GM-52074 to be removed from the engine.
Wide CompatibilityThe glow plug reamer is compatible with 6.6L/3.0L/2.8L Duramax engines. Replaces part numbers: GM-52074, Kent-Moore EN-52074, otc-7223. Matches EN-52074s action for all 6.6 L Duramax engines (2001present).
Superior DurabilityThis gm-52074 glow plug bore cleaner tool is crafted from heat-treated alloy steel, maintaining exceptional hardness and wear resistance even after repeated use. It effortlessly cuts through stubborn deposits without chipping or dulling, making it ideal for professional maintenance or multi-vehicle DIY scenarios.
Saves TimeRecommends using a small amount of grease on the flutes to collect any carbon that is removed from the bore. Simply turn this tool by hand. No need to use a wrench or socket. Using the gm-52074 glow plug bore reamer enables thorough carbon buildup removal within minutes, significantly boosting repair efficiency.
Prevent Engine DamageProper cleaning is essential to prevent glow plug tip breakage during installation, which can lead to severe engine damageincluding harm to the piston, valves, and cylinder headif debris falls into the combustion chamber.Effectively captures debris with grease-applied flutes, preventing harmful particles from entering the combustion chamberits mandatory to ensure a safe and reliable installation.

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Our Best Overall Choice

Best Choice

9.7

BGS

BGS 138-2 | Glow Plug Reamer M12 x 94 mm

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Editor's bottom line:

“This is the best one we tested. In terms of quality, brand and price, we couldn't ask for more.”

Main Highlights

made of chrome molybdenum steel
for professional cleaning of the glow plug manhole
cleaning of the manhole is recommended before installation of new glow plug
easy cleaning of the manhole
M12 x 1.25.reamer 6.9 mm

Show Price

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