Diesel injection specialists. In business since 1927.
Diesel parts and workshop services from Auckland, supporting customers across New Zealand and around the world.
Around for generations
In business since 1927, our expertise has evolved with the industry, from automotive to diesel fuel injection and turbochargers.
1988- 1927W.J. Loader Limited starts out in automotive.
- 1958Renamed Simms Diesel & Electrical Service Limited.
- 1983The electrical division is sold and Simms Diesel & Turbocharger Service Limited is created.
- 2000Family owned, as you know us today.
Built on diesel expertise
From the parts we source and supply to the pumps, injectors and turbos we test, rebuild and service in our Auckland workshop, specialist diesel knowledge is part of how we work. It backs the parts we stock and the advice we give.
How we can help
Parts
We stock genuine and aftermarket engine, fuel injection, turbocharger, auto electrical and governor parts in our Auckland warehouse, and import and export to order. Can’t find it online? Send us a part request.
Workshop
Our technicians repair and recondition injectors, pumps and turbochargers, clean DPFs and diagnose vehicle faults, all in-house.
Trade
We supply workshops and fleets in New Zealand and internationally, and we’re a Capricorn preferred supplier.
Industries we serve
If it runs on diesel, we can likely help.
- Passenger & light commercial
- Heavy trucks & fleets
- Agriculture
- Marine
- Construction & plant
- Industrial & generators
What our customers say
Amazing place. Rung for a price got.some advice and nailed the problem on the head with a 15min test. After 2 years of no one being able to sort.
Best place to get knowledge and parts for diesel engines, keep NZ moving.
Very helpful good people to deal with.