Mazda BT-50 2016 Problems

Your complaint about the suspension is quite a common one with one-tonne utes, not only with Mazdas, but many other brands as well. It's a message that should be heeded by anyone buying a one-tonne ute with the intention of putting it to work. Before you commit have it assessed by a suspension expert to establish if it really is up to the task you have in mind, or does it need upgrading. Your complaint about the company not reacting to your problem is not uncommon either, and it's not just from one company. There seems to be an industry wide reluctance to properly deal with customer concerns.

There have been reports of problems with the BT-50 auto, rough shifting etc., which could be enough to put you off buying one.

The Amarok is rated to tow 3000 kg, which would make it marginal for your needs given that you want to tow around three tonnes. The Ranger and BT-50 are rated at 3500 kg, which would make them more suitable for you. The Ranger and the BT-50 are the same vehicle, it's only the features that separate them. For me, of those you list the Mazda is the best value-for-money.

You need to know the all-up weight of the trailer with the three horses all your gear aboard. The horses alone weight 1500 kg, and the float is going to be 1500 to 2000 kg, so you need a vehicle capable of towing 3500 kg. There are a number on the market rated to tow that load, vehicles like the Holden Colorado, Mazda BT-50, Ford Ranger, Land Rover Discovery etc. You also need to be mindful of the Gross Combination Mass of the vehicle when you're going to tow at or near its maximum rating to ensure you don't exceed it.

Mazda’s advice is probably on the money. Worn injectors are a common cause of a rattle on cold starts on common-rail diesel engines like you describe.