CDTi are diesel motors with Common Rail fuel injection system, installed on Opel and Vauxhall cars. Many models of these makes have been equipped with such power units since 2003. Some CDTi engines are a common development of the General Motors and Fiat concerns. These engines have 4 cylinders and 16 valves, equipped with turbocharger and mostly with an intercooler. Depending on a version, a belt or a chain drive can be used in the valve timing mechanism. Generally, these motors are characterised by reliability, good traction, fuel economy and eco-friendliness.
Popular CDTi engines
| Engine index | Capacity, l | Output, hp | Torque, Nm | Year of production start | Model applications |
| A13DTE | 1.3 | 90‒95 | 180–200 | 2009 | Opel Astra J; Opel Corsa D; Opel Combo D; Opel Meriva B |
| A17DTJ | 1.7 | 110 | 260 | 2009 | Opel Astra J; Opel Astra H; Opel Zafira B |
| A17DTR | 1.7 | 125 | 280 | 2009 | Opel Astra J; Opel Zafira B; Opel Astra H |
| A20DTH | 2.0 | 160–170 | 350 | 2008 | Opel Cascada A; Opel Zafira C; Opel Astra J; Opel Insignia A |
| Z13DTJ | 1.3 | 75 | 170 | 2005 | Opel Agila B; Opel Combo C; Opel Corsa D; Opel Meriva A |
| Z13DTH | 1.3 | 90 | 200 | 2005 | Opel Corsa D; Opel Astra H |
| Z17DTH | 1.7 | 101 | 240 | 2003 | Opel Astra H; Opel Corsa C; Opel Combo C; Opel Meriva A |
| Z19DTH | 1.9 | 150 | 320 | 2004 | Opel Astra H; Opel Signum A; Opel Vectra C; Opel Zafira B |
| B16DTH | 1.6 | 136 | 320 | 2013 | Opel Astra J; Opel Meriva B |
Common malfunctions of CDTi engines
| Malfunctions | Engines |
| Timing chain breaks down prematurely. | A13DTE, Z13DTH. |
| Due to deterioration of rubber seals, sleeves of the fuel injectors get leaky. This is often caused by the use of low-quality coolant. | A17DTR, A17DTJ, Z17DTH. |
| The power unit is apt to jamming at high-speed driving, which is caused by oil starvation of the crankshaft bearings. | A20DTH. |
| The engine is very sensitive to reduction of oil level: in case of its insufficient level the chain slips, its rocker arms break down. | Z13DTH. |
| Elements of the Common Rail system often become unserviceable. | Z17DTH. |
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