TiD and TTiD engines are direct injection diesel engines. Saab vehicles were equipped with it between 1998 and 2012. The designation TiD is an abbreviation for Turbo Injected Diesel and means that the engine is equipped with a single turbocharger. TTiD or Twin Turbo Injected Diesel indicates that the engine is equipped with a twin turbo. In 1998 the first TiD engine appeared, which was installed in the Saab 9-3. Versions with TTiD engines were released in 2007. Almost all of these engines are from General Motors. Some of these were developed together with other manufacturers, including Isuzu Motors.
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TiD and TTiD Engine Features
TiD and TTiD engines have a cast iron engine block and an aluminum cylinder head. Most of them also have a common rail injection system. However, there are also versions without a fuel distributor, so that the fuel supplied by the pump is fed directly to the injectors. The valve control unit usually uses a belt; a chain is rarely used.
Popular TiD and TTiD Engines
| Name | Index | Displacement, l | Number and arrangement of cylinders | Number of Valves | Max. line, hp | Max. Torque, Nm | Year of manufacture | Saab models equipped with this engine type |
| TiD | D223L (X22DTH) | 2,2 | Row-Four | 16 | 115 | 260 | 1998 | 9-3; |
| TiD | D308L | 3.0 | V6 | 24 | 170 | 350 | 2001 | 9-5; |
| TiD | Z19DTH | 1,9 | Row-Four | 16 | 150 | 320 | 2004 | 9-3; |
| TTiD | Z19DTR | 1,9 | Row-Four | 16 | 180 | 400 | 2007 | 9-3; 9-5; |
| TiD | Z19DT | 1,9 | Row-Four | 8 | 120 | 280 | 1998 | 9-3; 9-5; |
| TiD | A20DTH | 2,0 | Row-Four | 16 | 170 | 350 | 2010 | 9-5. |
Frequent defects of TiD and TTiD motors
| Defects | Engines |
| The fuel system is prone to air locks. | X22DTH (D223L). |
| The diesel particulate filter and the EGR valve clog quickly. | X22DTH (D223L); Z19DTH. |
| The crankshaft pulley fails quickly. | X22DTH (D223L). |
| Engine oil can get into the fuel through dried out injector washers. | X22DTH (D223L). |
| The high pressure fuel pump electrical components fail quickly. | X22DTH (D223L). |
| The intake manifold tumble flaps are easy to break. | Z19DTH; A20DTH. |
| The exhaust manifold deforms due to high temperatures. | Z19DTH. |
| The main bearings of the Crankshafts are damaged due to a lack of oil, so that the engine stalls at high speeds. | A20DTH. |
| Leaks quickly occur at the engine oil cooler seals. | A20DTH. |
| A dirty fuel control valve can cause engine speed to become unstable. | A20DTH. |
| The engine block is prone to overheating. | D308L. |