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Lucas Lucas Ignition

Glow Plugs

A Perfect Start Every Time With Lucas

With over 150 years of OE and aftermarket expertise, Lucas brings unrivalled heritage to a brand-new range of premium glow plugs. Engineered to the highest standards using advanced materials and precision manufacturing, Lucas Glow Plugs are built to deliver rapid, reliable heating, ensuring fast, smooth cold starts and optimal combustion even in the harshest conditions.

The range provides consistent performance, exceptional durability, and long service life, reducing replacement intervals and ensuring dependable operation for diesel engines of every type. Designed around real aftermarket demand, stocking, selling, and fitting Lucas Glow Plugs is straightforward and profitable. Backed by the trust of the iconic green brand, Lucas Glow Plugs ignite confidence and keep diesel engines performing at their best.

Lucas Glow Plug

StockASSIST: Smarter Glow Plug Stocking

Glow plugs are one of the most frequent replacement parts in the aftermarket. With StockASSIST, we analyse vehicle parc data and sales demand to highlight the most popular Lucas Glow Plug references. This ensures factors and workshops always have the right plugs on the shelf — boosting turnover, reducing downtime, and maximising sales opportunities.

LGP001

LGP001

Lucas Glow Plug

LGP004

LGP004

Lucas Glow Plug

LGP002

LGP002

Lucas Glow Plug

LGP003

LGP003

Lucas Glow Plug

LGP005

LGP005

Lucas Glow Plug

LGP011

LGP011

Lucas Glow Plug

LGP008

LGP008

Lucas Glow Plug

LGP006

LGP006

Lucas Glow Plug

LGP012

LGP012

Lucas Glow Plug

LGP009

LGP009

Lucas Glow Plug

Product Support and Information

Glow plugs are an essential component in diesel engines, helping to pre-heat the combustion chamber to ensure reliable cold starting and smooth initial combustion. By raising cylinder temperature before and during start-up, glow plugs support efficient ignition, reduced emissions, and improved engine performance — particularly in colder conditions or on high-mileage vehicles.

Why Do They Fail?

Glow plugs operate in extreme conditions, repeatedly exposed to high temperatures, combustion pressures, and electrical load. Over time, this leads to natural wear — but premature failure can also be caused by external factors.

Common causes include:

  • Normal wear due to high mileage or age

  • Carbon build-up from incomplete combustion

  • Faulty glow plug control units or relays

  • Over-voltage or incorrect power supply

  • Engine management or injector issues affecting combustion

Symptoms of a Failed Glow Plug

A failing glow plug can impact starting, emissions, and overall engine smoothness — particularly in colder conditions.

Typical symptoms include:

  • Hard or extended cold starting

  • Rough idle immediately after start-up

  • Increased white smoke on start-up

  • Engine management warning light

  • Diagnostic fault codes relating to glow plug circuits

In many cases, more than one glow plug may be affected, so checking the full set is recommended.

Fitting Tips

Correct installation is essential to ensure glow plug performance and longevity.

Best practice fitting tips:

  • Always confirm correct fitment before installation

  • Replace glow plugs as a complete set where possible

  • Clean threads and seating areas before fitting

  • Use the correct torque setting — overtightening can cause damage

  • Avoid refitting old glow plugs once removed

✔ Professional installation is recommended
✔ Always follow vehicle manufacturer guidelines

Downloads

Lucas Vision & Control Brochure
Lucas Vision and Control Brochure
Lucas Spark Plug Mailer
Lucas Glow Plugs

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