If your Malibu already has front disc brakes, then you don't need to install them. If you're trying to upgrade from drum brakes to disc brakes, it's a significant undertaking, far beyond the scope of a simple answer here. It's not a simple bolt-on swap.
Here's why it's complicated and why you shouldn't attempt this at home unless you have significant mechanical experience:
* Compatibility: You need to find a disc brake system that's compatible with your specific Malibu model year and trim. This includes the spindles, calipers, rotors, brake lines, master cylinder (possibly), and potentially even the brake booster. Finding the correct parts is crucial for safety and proper function. Generic kits are unlikely to fit correctly.
* Spindles: The front spindles (the parts the wheels and brakes mount to) might need to be replaced if they aren't designed for disc brakes.
* Brake Lines: You'll likely need new brake lines, possibly with different routing.
* Master Cylinder: The master cylinder might need to be upgraded if it isn't sized correctly for the increased braking power of disc brakes.
* ABS System: If your Malibu has an Anti-lock Braking System (ABS), the conversion is even more complex and requires careful attention to the ABS components and wiring. Improper installation could damage the ABS system.
* Bleeding the Brakes: Proper bleeding of the brake system is essential after any brake work. Air in the lines can drastically reduce braking performance and is dangerous.
* Safety: Brakes are a critical safety system. Improper installation can lead to brake failure and serious injury or death.
Instead of attempting a DIY conversion, consider these options:
* Find a Malibu with disc brakes: Search for a used Malibu with front disc brakes and swap the parts. This is still complicated and might require a professional mechanic for disassembly, reassembly, and proper bleeding.
* Hire a professional mechanic: A qualified mechanic is the safest and most reliable way to upgrade your brakes. They have the expertise, tools, and parts to do the job correctly and safely.
In short, upgrading from drum brakes to disc brakes on a 2004 Malibu is a major project requiring significant mechanical skill and expertise. It's strongly recommended you seek professional help. Don't risk your safety by attempting this yourself unless you have extensive experience with automotive brake systems.
