1997-2002 Daewoo Leganza Ignition Switch: Solving Stalling, No-Start, and Electrical Issues

Symptoms of a Failing Daewoo Leganza Ignition Switch

A faulty ignition switch on a 1997-2002 Daewoo Leganza can cause a range of frustrating and intermittent electrical problems. Because the switch is the gateway for electrical power, its failure can mimic other issues, making diagnosis tricky. Watch for these common signs:

• Engine Stalls While Driving: One of the most serious symptoms is the engine shutting off unexpectedly while you are on the road. This happens when worn internal contacts in the switch momentarily lose connection, cutting power to the ignition system and engine computer.
• Car Won't Start or Crank: You turn the key to the 'START' position, but nothing happens. The dashboard lights may or may not come on, but the starter motor makes no sound. This indicates the switch is failing to send the signal to the starter relay.
• Starts and Immediately Stalls: The engine fires up for a second and then immediately dies. This can happen if the switch provides power in the 'START' position but loses contact when the key returns to the 'RUN' position.
• Flickering Dashboard Lights and Gauges: You may notice the instrument panel lights, radio, or climate control display flickering or turning off and on by themselves, either while driving or when turning the key. This points to a poor electrical connection inside the switch.
• Accessories Don't Work: The radio, power windows, or wipers don't work in the 'ACC' or 'ON' positions, even though the car may still start. This suggests the contacts responsible for powering these circuits have failed.
• Key is Hard to Turn or Gets Stuck: While often a problem with the mechanical lock cylinder, binding in a failing ignition switch can also make the key difficult to turn through its positions.

Known Issues, Recalls, and Technical Service Bulletins (TSBs)

While there are no major recalls or TSBs specifically for the ignition switch on the Daewoo Leganza, it's critical to be aware of related issues.

• Camshaft Position Sensor Recall (NHTSA Campaign ID: 04V337000): Daewoo recalled certain 1998-2002 Leganza models because a faulty camshaft position sensor could fail, potentially causing the engine to stall without warning, increasing the risk of a crash. The symptoms directly overlap with a bad ignition switch, so this should be investigated first.

Programming and Anti-Theft System

This is a major point of confusion for owners. The 1997-2002 Daewoo Leganza is equipped with a factory anti-theft immobilizer system. However, this system's components are separate from the ignition switch.

• No Programming Required: The ignition switch itself is a simple electrical part and contains no security logic. It does not need to be programmed or flashed to the vehicle. You can install a replacement switch, and it will work immediately.
• How the Immobilizer Works: The security system uses a transponder chip inside the ignition key, which is read by an antenna coil located around the mechanical lock cylinder. This information is sent to a separate immobilizer control module. If the key is not recognized, the immobilizer module will prevent the car from starting, but this is independent of the ignition switch's function.

Buying a Used Ignition Switch for Your Leganza

Given Daewoo's departure from the US market, new OEM parts are virtually nonexistent. A quality used OEM switch is often a better choice than a new, cheaply made aftermarket part. Here’s what to look for:

1. CRITICAL: Match the Transmission Type! This is the most important step. The Leganza uses two different ignition switches.
   • Automatic Transmission: These switches are designed to work with the key interlock system, which prevents you from removing the key unless the shifter is in Park. The switch assembly may have a different shape or extra wiring for this function.
   • Manual Transmission: These are simpler switches without the key interlock feature.

   Warning: The two switch types are not interchangeable. You must purchase a switch that matches your vehicle's original transmission (Automatic or Manual).

2. Inspect the Connector: Carefully examine the 6-pin electrical connector on the switch. Look for any signs of melting, discoloration (browning), or corrosion on the plastic or the metal blades. Overheating is a common failure mode, and a damaged connector indicates the switch was failing.
3. Check the Housing: Look for cracks or damage to the plastic body of the switch. A cracked housing can allow internal components to shift, leading to poor contact and intermittent failures.
4. Verify Part Numbers: If possible, match the part number on your original switch to the used one. Known Daewoo OEM numbers are 96205852 and 96205853. Aftermarket crosses include T882FR and APISS085.

Cost Comparison for a Daewoo Leganza Ignition Switch

Repair costs can vary, but here is a general breakdown of what to expect:

Replacement Overview

Replacing the ignition switch is a manageable DIY job for most home mechanics and typically takes under an hour.

1. Disconnect the Battery: Always disconnect the negative battery terminal before working on any electrical components.
2. Remove Steering Column Covers: Remove the screws holding the upper and lower plastic shrouds around the steering column to gain access to the ignition components.
3. Locate the Switch: The ignition switch is the electrical component mounted to the end of the mechanical lock cylinder housing.
4. Disconnect and Remove: Unplug the electrical connector from the back of the switch. Then, remove the one or two screws holding the switch to the lock housing and pull it away.
5. Install the New Switch: Installation is the reverse of removal. Secure the new switch, plug in the connector, re-attach the column covers, and reconnect the battery to test for proper function.

Frequently Asked Questions (FAQ)