Genuine Saab 55-352-173 Ionization Module for 9-3

The Genuine Saab 55-352-173 Ionization Module is an original equipment ignition control component designed for 2005-2011 Saab 9-3 models equipped with the B207 engine. Also known as the Combustion Detection Module (CDM), this critical component interfaces with the ignition coils to process ionization signals and monitor combustion quality in each cylinder.

Key Features:

• Genuine OEM Saab part ensures proper fit and function
• Monitors ionization current from each ignition coil to detect combustion quality
• Provides real-time feedback to the ECM for optimal spark timing and engine performance
• Integrated diagnostic capabilities for knock detection and misfire monitoring
• Compatible with Saab 9-3 1.8T, 2.0T, and 2.0T Aero models (2005-2011)
• Direct replacement for worn or failed ionization modules

This module is mounted on a bracket on the left side of the cylinder head and connects directly to the four ignition coils. When the ionization module fails, symptoms typically include difficulty starting, rough idle, misfires, or the engine failing to run. For optimal performance, Genuine Saab recommends installing new ignition coils and spark plugs when replacing the ionization module.

Note: This module is NOT compatible with earlier 2003-2004 Saab 9-3 models.