Saab 9-5 & 9-3 TWICE Module Guide: Fixing 'Key Not Accepted' & Electrical Issues

Vehicle Fitment and Important Distinctions

This guide specifically covers the TWICE module used in the following vehicles:

• 1999-2010 Saab 9-5 (9600 Chassis)
• 1999-2002 Saab 9-3 (9400 Chassis, often called 'OG' 9-3)
• 2003 Saab 9-3 Convertible (9400 Chassis)

Common Symptoms of a Failing TWICE Module

A failing TWICE module can manifest in several ways, ranging from a complete no-start to strange electrical behavior. Because the module is located under the driver's seat, it can be susceptible to water damage from clogged sunroof drains or spills, which can cause corrosion and failure.

1. 'Key Not Accepted' Message and No-Start Condition

This is the most common and definitive sign of a TWICE module failure. When you insert the key, the Saab Information Display (SID) will show the message "Key Not Accepted," and the engine will not crank or start. This happens because the TWICE module can no longer recognize the transponder code from the key, effectively immobilizing the car.

2. Central Locking and Key Fob Malfunctions

Since the TWICE module controls the central locking system, you may experience issues with your key fob (remote). Symptoms include:

• The remote failing to lock or unlock the doors.
• The central locking button on the center console not working.
• Doors not locking or unlocking correctly from the inside.

3. Erratic Electrical Behavior

The TWICE module also monitors and controls other vehicle systems. A failing unit can cause a variety of seemingly unrelated electrical problems:

• False "Brake Light Failure" or other bulb failure warnings on the SID.
• Power seats not working.
• Issues with the anti-theft alarm system.
• A faint clicking noise from under the driver's seat.

Diagnosing the TWICE Module

If you suspect a TWICE module failure, the first step is to check for Diagnostic Trouble Codes (DTCs) using a Saab-specific Tech 2 scan tool. Generic OBD-II readers cannot communicate with the TWICE module. A Tech 2 can read body codes (B-codes) that will point directly to a fault within the module or the systems it controls. Before condemning the module, it's wise to check for simpler issues like a dead key fob battery or water intrusion under the driver's seat where the module is located.

CRITICAL: Programming and Replacement Procedure

Replacing a TWICE module is not a simple plug-and-play operation. It is a critical security component, and strict programming procedures must be followed.

The 'Marry' and 'Divorce' Process

A new TWICE module must be programmed to the car. A used module from a donor car must first be 'divorced' from the donor car using a Tech 2 before it can be 'married' to your car. If a used module is not divorced, it cannot be programmed to another vehicle.

Replacement Options:

1. Saab Specialist/Dealer: The most straightforward option. A technician with a Tech 2 can diagnose the old module, install a new or used one, and perform the necessary 'Spare Part Programming' to marry the module and your existing keys to the car.
2. Cloning Service: Several services offer to clone the data from your original TWICE module to a compatible used unit. You mail both your original (even if faulty) and a donor module to the service. They transfer the VIN, key data, and security coding. The returned donor module becomes plug-and-play, requiring no further Tech 2 programming. This is an excellent option if you can't find a local Saab specialist.
3. Matched Set (TWICE + Keys + ECU): For a DIY approach without a Tech 2, you can source a matched set from a single donor car that includes the TWICE module, the original key(s), and the engine control unit (ECU). By swapping all three components, the car's security system remains synchronized. However, this can be more complex.

Buying a Used Instrument Panel Control Module (TWICE)

Purchasing a used TWICE module can be a cost-effective solution, but it requires careful attention to detail.

• Match the Part Number Exactly: Saab used different TWICE modules for different model years and body styles (e.g., sedan vs. wagon). Using the wrong part number can lead to issues like non-functional trunk releases or incorrect lighting behavior, even after programming. Always match the OEM part number from your original unit.
🎬 Watch: Why buying the wrong TWICE unit can cause issues
• Confirm its Status: Ask the seller if the module has been 'divorced' with a Tech 2. A divorced module is ready for programming. If it's not divorced, you will need to use a cloning service.
• Consider a Cloning Service: The safest bet when buying a used module is to plan on using a cloning service. This eliminates the uncertainty of whether the module was properly divorced and ensures all your car's original features and keys will work.
• Physical Inspection: When you receive the part, inspect the case for any signs of water damage or corrosion on the pins of the 70-pin connector.

Cost Breakdown

Prices can vary based on availability and location. The estimates below are for the part and labor separately.

Known Issues, TSBs, and Recalls

There are no major recalls specifically for the TWICE module itself. However, a recall (NHTSA 15021/15023) was issued for the Ignition Discharge Module (IDM) on some 9-3 and 9-5 models, which could cause a no-start condition sometimes confused with an immobilizer issue. Additionally, GM issued a recall for driver's side airbag inflators on 2006-2009 Saab 9-5 models. Always check your VIN for any open recalls.

Frequently Asked Questions (FAQ)