Buy the Mazda Bongo Friendee Service Repair Manual
Mazda Bongo models come with a turbodiesel 2.5L, a 2.5L V6 petrol engine or 2.0L petrol engine.
Bongo Diesel Engines:
Bongo Petrol Engines:
Most Mazda Bongos are fitted with a turbodiesel engine.
Buy the Mazda Bongo Friendee Service Repair Manual
The 2.5L V6 is shown below.

If you need to replace your Mazda Bongo engine, don't worry, it's not too pricey!
We have seen companies offering a full supply and fit service for under £1,000.
Low mileage engines are usually available and pre-tested before supply. Also consider rebuilding and reconditioning your existing Mazda Bongo engine with brand new genuine (OE) parts. This option can often work out cheaper.
If you go for a reconditioned Mazda Bongo engine then following components of your existing engine must be free of cracks and or damage and capable of being re-machined:
If you are unsure and not very technical you may need to get the engine inspected to see what the best option is for you.