The Most Common 2.0 Mazda LF-DE Engine Problems

The LF-DE engine is an in-line 4-cylinder engine with a volume of 2 liters, a maximum power of 139-160 hp and a torque of 175-183 Nm.

ICE was produced from 2002 to 2015, it was installed mainly on Asian models 3, 5, 6 and MX-5, as well as on some Ford cars.

Read Also: The Most Common 1.6 Mazda MZR Z6 Engine Problems

LF-DE Engine Specifications

Volume (cm3)1999
Power (hp)140-160
Torque175-195 Nm
Timing driveChain
Environmental classEuro 4
Fuel typeGasoline AI-92
ICE featuresDOHC
Supply systemDistribution injection
Hydraulic liftersNot
Cylinder blockAluminum R4
Cylinder headAluminum 16v
Cylinder diameter87.5 mm
Piston stroke83.1 mm
Compression ratio10.8
Phase regulatorNot
Engine oil4.3L 5W-30
Average resource300,000 km

Advantages And Reliability of The LF-DE Engine

Among the main advantages of the LF-DE engine, drivers distinguish the following characteristics:

  1. Aluminum cylinder block and cylinder head – the material is not only reliable, but also very light;
  2. Good power indicators;
  3. A small amount of emissions of harmful substances into the atmosphere – the engine meets environmental standards according to the Euro-4 class;
  4. Low fuel consumption: from 6.9 to 9.4 liters per 100 km, which is very good with such a volume and power;
  5. A good engine resource – with timely maintenance of consumables, the engine travels at least 300,000 km without major repairs.

Disadvantages and problems of the LF-DE engine

Among the most significant disadvantages of the LF-DE engine, the following should be noted:

  1. Quite often it is necessary to change the pump, thermostat and the right engine mount.
  2. Malfunctions in the operation of the throttle assembly, as a result of which the revolutions float.
  3. The absence of hydraulic lifters, so there is a need for manual adjustment of the valves.
  4. With a run of more than 200,000 km, an oil burn and stretching of the timing chain is noted.
  5. Also, the disadvantages include jamming or falling out of the intake flaps. But such a problem often occurred in the early years of engine production. Then the engineers managed to eliminate it.

Also, motorists note that the engine is not particularly whimsical to fuel – it perceives AI-92 gasoline well.

Applicability of LF-DE engine

  • Mazda : 3 (2003-2013), 5 (2005-2007), 6 (2002-2012), MX-5 (2005-2015)

LF-DE engine Tuning prospects

There are not many options that can significantly increase the power of this engine. The most effective will be the installation of a turbocharger, flashing and competent professional tuning.

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