1997-2002 Daewoo Leganza Calipers: Decoding Casting Marks for a Perfect Fit

Symptoms of a Failing Caliper

A bad brake caliper can cause a range of symptoms, from strange noises to serious safety concerns. Because the Daewoo Leganza is an older vehicle, corrosion and wear are common culprits for caliper failure.

• Vehicle Pulling to One Side: If a caliper piston or its slide pins seize, the brake on that wheel can either fail to apply or fail to release. If it's stuck applied, the car will constantly pull toward that side while driving. If it's stuck released, the car will pull to the opposite side when you brake because only one front brake is doing the work.
• Uneven Brake Pad Wear: A classic sign of a sticking caliper is severely uneven pad wear. When you inspect the pads, the one on the seized caliper's side will be much thinner than the other. You might see the inner pad worn down to the metal while the outer pad looks nearly new, often due to seized slide pins.
• Spongy or Soft Brake Pedal: A leak in the caliper's piston seal or around the bleeder screw can let brake fluid out and air in. Air in the hydraulic system is compressible, leading to a brake pedal that feels soft, spongy, or goes closer to the floor than usual. A high-mileage Leganza was noted by an owner to have "super spongy" brakes, which could be a symptom of a failing caliper or old brake hoses.
• Brake Fluid Leaks: You may see brake fluid, which has an oily consistency, on the inner side of your wheel or on the ground near the tire. This indicates a leak from a deteriorating piston seal or a loose banjo bolt.
• Dragging Sensation or Burning Smell: A caliper that doesn't release properly will cause the brake pads to drag on the rotor continuously. This creates constant friction, which you might feel as a dragging sensation or a lack of power. It also generates extreme heat, which can produce a sharp, acrid burning smell from the affected wheel.
• Squealing or Grinding Noises: When a caliper is stuck, it can cause the brake pads to make contact with the rotor at all times, leading to persistent squealing or grinding sounds.

Known Issues for 1997-2002 Daewoo Leganza

The Critical Importance of Casting Numbers

The single most important factor when replacing a front caliper on a Daewoo Leganza is matching the casting numbers on your original part. Due to variations in manufacturing, simply ordering a part by year and model is not enough to guarantee a correct fit. Using a caliper with the wrong casting can result in mounting issues or improper brake function.

• Front Passenger Side (Right): Look for casting number DAC 7R on the caliper body and DAC 8 on the mounting bracket.
• Front Driver Side (Left): Look for casting number DAC 7L on the caliper body.

These numbers are physically cast into the metal of the caliper and its bracket. You will need to clean the parts with a wire brush to see them clearly.

Related Recall: Front Brake Hoses

While there are no specific recalls for the Leganza's calipers, a highly relevant recall was issued for the front brake hoses on many 2000-2002 Daewoo models (NHTSA Recall No. 02V257). The original hoses could develop cracks, leading to a sudden loss of brake fluid and braking power. An old, internally collapsed brake hose can also mimic a seized caliper by trapping hydraulic pressure and preventing the caliper from releasing. If you are replacing a caliper, it is strongly recommended to replace the flexible brake hoses at the same time.

Buying a Used Caliper: What to Inspect

A used OEM caliper can be an excellent, cost-effective choice, often outlasting cheap aftermarket alternatives due to superior materials and exact fitment. However, a thorough inspection is key.

1. Verify Casting Numbers: This is the first and most important step. Take a photo of the casting numbers on your original caliper and compare it directly to the numbers on the used part. Do not buy it if they do not match.
2. Check the Piston Boot: The rubber boot around the piston must be intact. If it's torn, cracked, or missing, moisture and dirt have likely entered the piston bore, causing corrosion and seizure. A caliper with a damaged boot should be avoided.
3. Inspect the Bleeder Screw: Ensure the bleeder screw is present and not broken off. Try to gently turn it with a wrench to make sure it isn't seized. A broken or seized bleeder screw makes it impossible to bleed the brakes, rendering the caliper useless.
4. Examine the Slide Pins: If the caliper includes the mounting bracket, pull the slide pins out. They should move smoothly with light resistance. If they are rusted, bent, or completely stuck, the caliper will not function correctly. You can often clean and re-lubricate sticky pins, but a fully seized pin is a major red flag.
5. Look for Corrosion: A light surface rust is normal for a cast iron part. However, avoid calipers with heavy, flaking rust, especially around the piston boot and banjo bolt connection, as this indicates a part that has seen extreme conditions.
6. Check Threads: Inspect the threads for the banjo bolt (where the brake hose connects). They should be clean and free of damage. Stripped threads will cause a brake fluid leak.

Cost Comparison for Daewoo Leganza Caliper

Since Daewoo has not sold cars in the US for many years, new OEM parts are generally unavailable. Your primary options are remanufactured, new aftermarket, or used OEM.

Replacement Overview & Difficulty

Replacing a caliper on a Daewoo Leganza is a moderately difficult job for a DIYer. While the mechanical steps are straightforward, the final step of bleeding the brakes is critical and must be done correctly to ensure safety.

• Difficulty: 3 out of 5
• Estimated Time: 1.5 hours per wheel
• DIY Feasible: Yes, for those with mechanical experience and proper tools.

Basic Steps:

1. Safely lift and support the vehicle on jack stands and remove the wheel.
2. Place a drain pan under the caliper. Loosen the banjo bolt connecting the brake hose to the caliper, but do not remove it yet.
3. Remove the two caliper mounting bolts that secure the caliper to the bracket or knuckle.
4. Slide the old caliper off the rotor. Now, fully remove the banjo bolt and quickly transfer it to the new caliper with new copper washers to minimize fluid loss.
5. Install the new caliper, ensuring the slide pins are properly lubricated with silicone brake grease.
6. The most critical step: Bleed the brakes. Starting from the wheel furthest from the master cylinder (typically the rear passenger side), you must bleed all four wheels to remove any air that entered the system. Failure to do so will result in a spongy pedal and unsafe braking.

Frequently Asked Questions (FAQ)