Engine Volkswagen AJT

The 2.5-liter Volkswagen AJT 2.5 TDI diesel engine was produced from 1998 to 2003 and was installed in the very popular Transporter family of minibuses in the back of the T4. This 5-cylinder diesel engine was the weakest in its series of engines and did not have an intercooler.

The EA153 series also includes: AAB, AJT, ACV, AXG, BAC, BPE, AXD, AXE, AJS, AYH.


Production years 1998-2003
Displacement, cc 2460
Fuel system direct injection
Power output, hp 88
Torque output, Nm 195
Cylinder block cast iron R5
Block head aluminum 10v
Cylinder bore, mm 81
Piston stroke, mm 95.5
Compression ratio 19.5
Features SOHC
Hydraulic lifters yes
Timing drive belt
Phase regulator no
Turbocharging yes
Recommended engine oil 5W-40
Engine oil capacity, liter 5.5
Fuel type diesel
Euro standards EURO 2/3
Fuel consumption, L/100 km (for VW Transporter 1995)
— city
— highway
— combined
Engine lifespan, km ~450 000

The engine was installed on:

  • Volkswagen Transporter T4 (7D) in 1998 – 2003.

Disadvantages of the VW AJT engine

  • The main problems of this diesel engine are associated with high pressure fuel pumps or injectors;
  • Aluminum cylinder head is afraid of overheating, monitor the integrity of the cooling system;
  • Every 100,000 km, an expensive replacement of the timing belt and injection pump belt, as well as their rollers, is required;
  • On long runs, the vacuum pump often knocks, and the turbine starts to drive oil;
  • Even in old engines there are a lot of electrical problems, especially the mass air flow sensor is often buggy.

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