Where’s the job?

Scope of Works

• run a diagnostic scan to identify faulty glow plug circuits and related fault codes

• isolate battery and use appropriate PPE while working on electrical components

• remove and replace faulty glow plug(s) using manufacturer‑specified parts where possible

• inspect and test glow plug relay, wiring and connectors and report any additional repairs needed

• clear codes and perform starter/engine checks to confirm correct operation after fitting

• dispose of old plugs and packaging and provide a brief written report of work done

Typical Cost

Time on Site

Most glow plug replacements take 1–3 hours on site including diagnosis and testing; diagnostics only can be 0.5–1 hour. Time increases for seized plugs, hard‑to‑access engines, turbo or manifold removal, or when parts need ordering.

Questions to Ask Your Tradie

• is a full diagnostic scan included in the quote or charged separately

• will you replace individual faulty plugs or recommend replacing the full set and why

• what brand or specification of parts will you fit and what warranty covers parts and labour

• what could push the job beyond the estimate (seized plugs, injector work, turbo/manifold removal)

• do you test the battery and charging system as part of the job and clear fault codes on completion

How to Avoid Surprises

• make keys, alarm and immobiliser info available so the fitter can start promptly

• provide clear access to the engine bay and off‑street parking or a nearby permit

• tell the tradie about previous engine work, known seized bolts or corrosion

• check parts availability for your specific make and model and agree whether originals are required

• secure pets and ensure a clean, dry area for work to reduce delays and contamination