Peugeot 307 Rear Brake Disc & Pad Replacement

Replacing the rear brake discs and pads on your Peugeot 307 might seem like a daunting task, but with the right guidance and tools, it's a manageable job for the home mechanic. This comprehensive guide will walk you through each step of the process, from initial safety precautions to the final reassembly, ensuring you have all the tips and tricks needed for a successful repair. A key characteristic of the Peugeot 307's rear discs is the integrated wheel bearings, which, while simplifying the installation in some ways, also contributes to their surprisingly higher cost compared to other models. Furthermore, retracting the brake calipers on a 307 requires a specific clockwise motion and considerable pressure, often necessitating a specialist brake rewind tool, which can be the most challenging aspect without the correct equipment. While our example vehicle is an '05 HDI model, the process remains largely consistent across all yearly variations of the Peugeot 307.

Safety First: Non-Negotiable Preparations

Before you even think about touching a wrench, it's paramount to prioritise safety. We apologise if this seems patronising, but neglecting these steps can lead to serious injury. Always perform any maintenance on a flat, stable, and appropriate surface. Ensure all your tools are suitable for the job; for instance, verify that your jack's weight capacity is adequate for your car. Whenever possible, use axis supports in conjunction with your jack for maximum stability. If you're ever in doubt, never take risks. This guide is provided for information only, and professional assistance should be sought if you are unsure. Crucially, the car must not be able to move during the repair. Place the car in gear (as the handbrake only secures the rear wheels, which will be lifted) and position robust blocks in front of and behind the front wheels to prevent any unwanted movement.

Essential Tools for the Job

Having the correct tools makes all the difference. Here’s a list of what you’ll likely need:

Step-by-Step Guide: Removal of Rear Brake Discs

1. Removing the Rear Wheel from the Car

The initial and most obvious step is to remove the wheel to gain access to the braking system. While the car is still on the ground and weighted, use your wheel wrench to undo each wheel nut by half a turn in an anti-clockwise direction. Once the nuts are loosened, carefully jack the car up to the required height and immediately place axis supports underneath to keep the car safely lifted. A piece of wood placed on top of your jack or stand can prevent damage to the car's bodywork. Now, remove each of the wheel nuts completely and store them in a suitable container to prevent loss. Carefully remove the wheel; be mindful that it can weigh between 7-10kg and is only partially balanced on the hub. This action will expose the worn brake pads and rear discs. At this stage, it’s a good idea to double-check that the new discs you have purchased are indeed identical to the ones you are about to remove. Ensure the handbrake is fully released before proceeding.

2. Removing the Brake Caliper

The calipers are responsible for holding the brake pads and compressing them against the disc when the brakes are applied. In theory, this should be a straightforward step, but in practice, rust, corrosion, and a sometimes frustrating design can make it challenging. The first stage involves separating the caliper from its support bracket. There are two bolts that secure the caliper to the bracket, located on the rear of the mount. Be aware that the socket required for these bolts is often a star-shaped key, a common feature favoured by French car manufacturers. These star sockets can be prone to weakness, so always ensure that pressure is applied evenly over the bolt, never pulling at an angle, to prevent stripping the head. The socket recess can accumulate dirt and rust over time, so it is highly advisable to clean it thoroughly with a wire brush or a small screwdriver to remove any debris before attempting to loosen the bolt. This ensures a good, positive contact between the wrench and the bolt. Once the bolts are removed, if the caliper is rusted to the main support, a gentle tap with a hammer can help free it.

At this point, the caliper will still be attached to the car via the brake fluid line. It is crucial *not* to remove the brake lines, as this is a major undertaking that requires bleeding the system and dealing with highly corrosive brake fluid. Instead, it is advisable to place the caliper on a block or suspend it securely to remove any strain on the piping.

3. Removing the Caliper Yoke (Guard and Mount Block)

Next, the caliper yoke, which acts as a guard and mounting block, needs to be removed. The caliper yoke is detached in a similar manner to the caliper itself and is held in place by two rear caliper screws. Again, these are typically star screws and will likely be very tight due to corrosion. They will require directed force to remove. It's important to note that these caliper screws are removed by turning anti-clockwise. However, if you are working while facing the car, they might appear to turn clockwise because the caliper screws are on the opposite side to your direct line of sight. Always confirm your turning direction.

4. Undoing the Axle Bolt and Removing the Rear Disc

The brake disc is secured to the axle stub by a 32mm nut, which is protected by a dirt or dust cap. This dust cap is typically only pressed into place, but over time, the joint can become heavily rusted and seized. To free the cap, use a small screwdriver to gently tap around the edge until the cap loosens and pops off. The 32mm axle nut itself is held in place by a punch mark on the bolt. Use your small screwdriver to carefully lift up this notch. The axle bolt should be relatively easy to undo as it must allow the bearings to rotate freely. Also, keep the bolt and its thread as clean as possible to prevent any dirt from contaminating the greased thread. With the nut removed, the disc is now free to be removed. However, it is usually solidly attached by rust and corrosion. Use a hammer to loosen the rear disc by tapping the back of the plate firmly. Some models of the Peugeot 307 might have two torx screws that also hold the disc to the hub; if so, undo these bolts. If not, you'll need to hit the disc harder to free it!

5. Cleaning and Inspection of the 307 ABS Sensor

One of the most common issues reported with the Peugeot 307 is the ABS warning error, often accompanied by a 'Christmas-tree' light display on the dashboard. The ABS sensor for the rear wheels is located directly behind the disc, and its attachment bolt is only accessible once the disc has been removed. While the new Peugeot 307 rear disc set does not typically include a new ABS sensor, it does feature a new magnetised strip on the rear side of the disc, which the sensor detects. Usually, the fault lies with the sensor itself rather than the magnetic strip. It is strongly recommended to clean the end of the sensor at this stage, as this is a very common cause of ABS issues with the car. The sensor is held in place by an Allen key bolt and a rather weak plastic clip, but it is often advisable to clean it without fully removing it if possible. There must be an exact gap of 1-2mm between the sensor and the magnetic strip; otherwise, an ABS fault will be registered.

6. Retracting the Caliper Piston

This is arguably the most fiddly and potentially annoying stage of replacing the rear discs and pads. The caliper piston on a Peugeot 307 can only be compressed back into its housing with a clockwise twisting motion, combined with significant pressure. A simple G-clamp compression, which works on some other vehicles, will *not* work here and will only damage the internal thread of the caliper. The piston requires many turns combined with substantial pressure to retract fully. A specialist brake rewind tool is by far the simplest and most efficient method, potentially reducing hours of frustrating work to mere minutes. These tools are readily available and typically cost between £20-30. If you are not using a rewind tool, the rubber dust cover on the caliper can be folded back on itself to make gripping the piston easier. Be aware that the depth of the thread on a universal caliper tool and the caliper depth may not perfectly align, so it might be necessary to twist the caliper (clockwise) without any compression pressure initially until it seats properly.

Reassembly: Putting New Parts Back Together

While dismantling the braking system can consume three-quarters of the job time, putting everything back together is significantly easier and is largely the absolute reverse of the removal stages. The key observation during reassembly, particularly concerning the 32mm axial bolt, is to avoid overtightening. Simply align the axial recess with the punch mark in the bolt and re-punch it to secure.

1. Attaching the New Disc

Carefully place the new disc onto the axle spindle. Once aligned, secure it with the 32mm axle nut. This nut must *not* be overtightened; excessive tightening will prevent the wheel bearing from rotating smoothly and could cause the wheel to seize. The notch on the bolt, which is designed to prevent the nut from loosening, serves as a very useful guide to the exact required torque. Line up the notch on the bolt with the corresponding gap on the central bar and tap it firmly with a hammer to prevent any future movement.

2. Replacing the Caliper and Pads

Next, attach the brake mounting bracket back onto the Peugeot 307 using the two star thread bolts. It is imperative that brake pads should always be replaced at the same time as the disc. Reusing old pads is a false economy; it will result in initially poor braking efficiency and will quickly lead to the new discs becoming badly scratched and damaged. Place the two new brake pads next to the disc, ensuring they are correctly seated. Then, attach the caliper using its two star bolts. This step can be a little tricky, as the two new brake pads are spring-loaded and will push the caliper off-centre. Gently compress them as you align and secure the caliper. Once everything is reassembled, it’s time to test the new disc and pads. Without starting the engine (as the car should still be in gear with wheel blocks), pump the brake pedal five times. Then, hold the pedal down and ask a friend to check that the brake is locking up the wheel. If the brakes feel good and are locking up correctly, you can now attach the wheel, tighten the wheel nuts securely, and safely lower the vehicle.

Frequently Asked Questions (FAQs)

Why are Peugeot 307 rear brake discs surprisingly expensive?

The rear brake discs on a Peugeot 307 have the wheel bearings inbuilt. This design simplifies the replacement process in some ways, but it also means you're effectively buying a disc and a new wheel bearing unit together, which increases the cost.

What is the most challenging part of replacing the rear brakes on a Peugeot 307?

Retracting the brake caliper piston is generally considered the most challenging stage. It requires a specific clockwise twisting motion combined with significant pressure, which is best achieved with a specialist brake rewind tool.

Do I need a special tool to retract the brake caliper?

While it is technically possible without one, a specialist brake rewind tool is highly recommended. It makes the job significantly easier, faster, and reduces the risk of damaging the caliper's internal thread.

What causes the common ABS warning error on a Peugeot 307?

The ABS warning error on a Peugeot 307 is very common and is often caused by a dirty or faulty ABS sensor rather than the magnetic strip on the disc. Cleaning the sensor during disc replacement is a good preventative measure.

Can I reuse my old brake pads with new discs?

No, it is strongly advised against. Reusing old pads will lead to poor braking efficiency, can cause rapid wear and scratching of your new discs, and is a false economy in the long run. Always replace pads when replacing discs.

How do I know if the 32mm axle nut is tightened correctly?

The 32mm axle nut has a notch designed to prevent it from loosening. Align this notch on the bolt with the corresponding gap on the central bar and tap it firmly with a hammer. It's crucial not to overtighten this nut, as it can impede the smooth rotation of the wheel bearing.

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