Heavy diesel mechanics across Northland.
Commercial Diesel Ltd's qualified heavy diesel mechanics keep trucks, trailers and fleets running from three workshops — Warkworth, Whangarei and Waipapa (Kerikeri) — with 24/7 roadside help when you break down.
What our diesel mechanics do
- Scheduled truck, trailer and heavy fleet servicing
- Diesel engine diagnostics with dealer tools and Jaltest multi-brand
- Full diesel engine rebuilds and major repairs to manufacturer spec
- Gearbox and diff rebuilds
- Onsite COF inspections at all branches
- Auto electrical and A/C (Whangarei & Warkworth)
- Insurance and accident repairs
- 24/7 roadside breakdown callouts
Find a diesel mechanic near you
Diesel mechanic Warkworth
2 Gumfield Drive, Warkworth, Auckland · serving North Auckland & Rodney
09 425 8456Diesel mechanic Whangarei
40 Gumdigger Place, Raumanga, Whangarei · serving Whangarei & Mid Northland
09 438 6915Diesel mechanic Kerikeri
18-20 Kahikatearoa Lane, Waipapa · serving Kerikeri, Waipapa & the Far North
09 407 5514Common questions
Which trucks do your diesel mechanics work on?
All makes. We are an authorised Southpac dealer for Kenworth, DAF and JAC, and also service Cummins-powered, Hino, IVECO and other heavy vehicles.
Do you do breakdown callouts?
Yes — call your nearest branch any time, day or night, for 24-hour roadside assistance across North Auckland and Northland.
Can I get a COF at the same time as a service?
Yes. COF inspections are done in-house at Warkworth, Whangarei and Kerikeri, so servicing, repairs and the COF can be done in one visit.