Diesel injection specialists. In business since 1927.
Diesel parts and workshop services from Auckland, supporting customers across New Zealand and around the world.
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Featured products
Siemens common rail injector A2C8139490080 for Ford Ranger PX2 2.2L and 3.2L
Siemens common rail injector A2C59517051 for Ford Ranger, Transit and Mazda BT-50 2.2L and 3.2L
OVRDRV
Premium aftermarket parts and accessories for passenger, commercial, agricultural and marine applications. Simms Diesel is an authorised OVRDRV stockist.
Intercooler hose for Ford Ranger PX / Everest / Mazda BT-50 3.2L turbo diesel, 2011–2022
Manufacturer and model names are used solely to identify compatible OVRDRV aftermarket applications. OVRDRV is independent of the relevant manufacturers; its products are not genuine or manufacturer-approved parts.
Rebuilt, tested and back to you
Injectors, pumps, DPFs, turbos and governors, serviced in-house in Auckland.
If it runs on diesel, we can likely help
From passenger vehicles and fleets to marine, agriculture and heavy equipment, our diesel knowledge spans a wide range of applications.
- Passenger & light commercialCars, utes, vans and light commercial fleets.
- Heavy trucks & fleetsParts, diagnostics and diesel services for trucks and commercial fleets.
- AgricultureDiesel systems for tractors, harvesters and farm equipment.
- MarineDiesel fuel systems for inshore and offshore applications.
- Construction & plantDiesel systems for excavators, loaders and plant equipment.
- Industrial & generatorsDiesel fuel injection systems for generators, pumps and stationary engines.
We know diesel
Simms has been in business since 1927, and our expertise has evolved with the industry, from automotive to diesel fuel injection and turbochargers. Today that knowledge runs through everything we do, from the parts we source and supply to the pumps, injectors and turbos we test, rebuild and service in our Auckland workshop. It backs the parts we stock and the advice we give.

Brands we stock
Can't find a part?
We hold far more parts than we list online. Send us the part number, vehicle or engine and we'll find it, usually within one working day.
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.








