HM Motors

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Engine diagnostics & repair

Warning light on.
Let us read it.

We plug in, read the fault codes, and test the parts the codes point at. Then you get a quote for the actual repair, not a guess.

  • WOF while you wait
  • Free courtesy car
  • All makes & models
  • 33 years’ combined experience
  • Quote first, work second
  • Pickup & drop-off in New Lynn
  • Open Saturday mornings
  • New Lynn, Auckland

A fault code is a clue, not an answer.

A scan tool tells you which system is unhappy. It does not tell you which part has failed — that takes testing, and that is where experience counts.

We read the codes, check live sensor data, and test the components before recommending anything. It saves you paying for parts your car did not need.

We handle petrol, diesel, turbo, hybrid and EV systems, plus auto electrical faults like alternators, starters, batteries and wiring.

What is included

Signs to watch for

Get it scanned when.

If any of these sound familiar, bring the vehicle in and we will take a look.

The check engine light is on

A steady light means get it looked at soon. A flashing light means stop driving and call us.

It is using more fuel

A failing sensor will quietly cost you money at the pump long before anything breaks.

It is hard to start

Cranking slowly, stalling or rough idling is usually electrical, fuel or ignition. A scan narrows it down fast.

Other services

While it is here.

WOF Inspections

Warrant of Fitness checks while you wait, with a clear explanation of anything that fails and a straight answer on what it takes to pass.

General Servicing & Oil Changes

Oil and filter changes, fluid top-ups and a full safety check to keep your vehicle reliable and your service book up to date.

Mechanical Repairs

Engine, cooling, transmission and clutch work on all makes and models. We tell you what needs doing now and what can wait.

Need a WOF or a service this week.

Call the workshop and we will tell you straight away when we can take your vehicle. Or send a booking request and we will come back to you.