Engine Mazda B5-DE

The 1.5-liter 16-valve Mazda B5-DE engine was produced by the company from 1989 to 2005 and was installed on models such as the Eunos 100 or Familia, as well as on cars from Kia under the BFD index. The most powerful version of this unit, the 125 hp B5-ZE, was offered only in the Japanese market.

The B-engine family includes: B1, B3, B3‑ME, B5, B5‑DE, B5‑ME, B6, B6‑ME, B6‑DE, BP, BP‑ME.

The engine was installed on:

  • Mazda 323 BG in 1989 – 1994;
  • Mazda Autozam AZ-3 EC in 1991 – 1998;
  • Mazda Eunos 100 BG in 1989 – 1994; Eunos Presso EC in 1991 – 1998;
  • Mazda Familia BG in 1989 – 1994; Familia BH in 1994 – 1996.


Production years 1989-2005
Displacement, cc 1498
Fuel system injector
Power output, hp 105 – 120
Torque output, Nm 125 – 145
Cylinder block cast iron R4
Block head aluminum 16v
Cylinder bore, mm 78
Piston stroke, mm 78.4
Compression ratio 9.2 – 9.5
Features DOHC
Hydraulic lifters yes
Timing drive belt
Phase regulator no
Turbocharging no
Recommended engine oil 5W-30
Engine oil capacity, liter 3.2
Fuel type petrol
Euro standards EURO 2
Fuel consumption, L/100 km (for Mazda Familia 1990)
— city
— highway
— combined
Engine lifespan, km ~350 000
Weight, kg 129.3

Disadvantages of the Mazda B5-DE engine

  • A simple and reliable engine does not cause so many problems to its owners.
  • Based on discussions on specialized forums, most often the ignition system fails here.
  • Hydraulic lifters do not tolerate cheap oil and can knock even up to 100,000 km.
  • The timing belt is designed for approximately 60,000 km, but when it breaks, the valves do not bend here.
  • On very long runs, an oil burner is often found due to the occurrence of rings.

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