Engine Opel Z12XEP

Engine Opel Z12XEP

The Z12XEP engine is a 1.2-liter, 4-stroke naturally aspirated petrol engine of the second generation Ecotec Family 0, developed by Opel (then a subsidiary of GM). The engine has been produced since 2002.

The Opel Z12XEP engine uses a lightweight cast iron cylinder block with a cast iron crankshaft and an aluminum overhead camshaft head with 2 chain drives (DOHC) and 4 valves per cylinder (16 valves in total). This is an updated version of the Z12XE engine equipped with Twinport technology. The crankshaft and oil galleries have also been redesigned. The engine uses ECU Bosch ME7.6.1 / Bosch ME7.6.2.


Manufacturer Aspern engine plant
Also called Z12XEP
Production years 2004-2009
Cylinder block alloy cast iron
Fuel system injector
Configuration inline
Number of cylinders 4
Number of valves 16
Piston stroke, mm 72.6
Cylinder bore, mm 73.4
Compression ratio 10.5
Displacement, cc 1229
Power output, hp 80/5600
Torque output, Nm / rpm 110/4000
Fuel type 95
Euro standards Euro 4
Fuel consumption, L/100 km (for Opel Corsa C)
— city
— highway
— combined
Oil consumption, gr/1000 km up to 600
Recommended engine oil 5W-30, 5W-40
Engine oil capacity, liter 3.5
Oil change interval, km 15000
Normal engine operating temperature, °C 90-95
Engine lifespan, km
— official information
— real


Engine Opel Z12XEP under the hood

Explanation of Z12XEP marking

  • Z – Euro 4 engine;
  • 12 – 1.2 liters;
  • X – Compression ratio from 10 to 11.5: 1;
  • E – multi-point fuel injection system;
  • P – increased power.

Frequent problems

  • most of the calls to the service are due to electrical failures or an ECU block;
  • in second place are the problems with the Twinport dampers and the EGR valve;
  • chain resource rarely exceeds 100,000 km, then it stretches and begins to rattle;
  • also periodically the owners have to replace the thermostat and the oil pump;
  • when looking for the source of an oil leak, start with the oil pressure sensor, the weak point is there.

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