Replacing the gearbox mount can be challenging due to the tight tunnel space. Here's a step-by-step guide:

• Set it up on jack stands, ensuring it's safely elevated.
• Connect the negative terminal to prevent electrical mishaps.
• Locate the gearbox mount underneath the car. It's typically situated between the gearbox and the frame.
• Support the gearbox with a transmission jack or suitable lifting device.
• Remove any bolts or brackets securing the old gearbox mount in place.
• Carefully maneuver the old mount out of the tight space.
• Install the new gearbox mount, ensuring it's properly aligned and secured with bolts or brackets.
• Lower the transmission jack and reconnect the negative battery terminal.
• Test the vehicle to ensure proper gearbox mount installation and functionality.

Recommendation: Refer to the vehicle's manual for specific torque specifications and safety precautions.

Universal joint wear can lead to significant issues if not addressed promptly. Inspect and replace the universal joint:

• Lift the vehicle securely on jack stands and disconnect the battery.
• Locate the universal joint, which is usually positioned at the end of the driveshaft.
• Scrutinize the universal joint and watch for signs of wear, like looseness or missing needle bearings.
• If wear is evident, mark the position of the driveshaft and remove it from the vehicle.
• Use appropriate tools to disassemble the universal joint, taking note of its orientation.
• Install a new universal joint, ensuring proper alignment and lubrication.
• Reassemble the driveshaft, paying attention to the marked position.
• Reconnect the battery and lower the vehicle.

Refer to the vehicle's manual for specific procedures and torque specifications for universal joint replacement.

Oil leaks are common in older Peugeot 203s and can stem from worn seals or gaskets. Here's how to tackle them:

• Park the vehicle on a level surface and allow the engine to cool.
• Inspect the engine, gearbox, and differential for any signs of oil seepage.
• Identify the source of the leak, which could be from seals, gaskets, or other components.
• Replace worn seals or gaskets as necessary, ensuring proper fitment.
• Thoroughly clean the affected area to remove oil residue.
• Monitor the vehicle for any recurrence of oil leaks and address them promptly if they reappear.

Recommended method: Consult the vehicle's manual for diagrams and specifications regarding oil seal and gasket replacement.

Electrical issues like faulty switches or dim lights can be frustrating. Here's a systematic approach to troubleshooting:

• Begin by checking the vehicle's fuse box for any blown fuses related to the malfunctioning components.
• Inspect the wiring harnesses for any signs of damage, such as fraying or corrosion.
• Test electrical components individually, such as switches and lights, to identify the source of the problem.
• Voltage should be checked using a multimeter at various points in the electrical system.
• Replace any faulty components or repair damaged wiring as needed.
• Consider consulting a professional automotive electrician if the issue persists.

Manual recommendation: Refer to the vehicle's manual for wiring diagrams and troubleshooting tips for electrical systems.

Cor corrosion and rust can damage the vehicle. Here are some preventive steps:

• Regularly inspect the chassis, floor pans, and wheel arches for signs of rust or corrosion.
• Wash the vehicle regularly, especially in winter or coastal areas where salt exposure is expected.
• Apply a rust inhibitor or protective coating to vulnerable areas to prevent corrosion.
• Keep the undercarriage clean and free of debris to minimize moisture retention.
• Paint scratches and chips should be addressed promptly to prevent rust from forming.
• If possible, place the vehicle in a dry, climate-controlled area when not in use.

As per the manual: Refer to the vehicle's manual for recommended rust prevention products and application techniques.

Proper suspension maintenance is crucial for ride quality and handling. Follow these steps:

• Inspect the suspension components regularly for signs of wear, such as leaking shocks or cracked bushings.
• Replace worn-out shocks, bushings, and springs with quality aftermarket or OEM parts.
• Use suitable jack and jack stands to safely elevate the vehicle for inspection and maintenance.
• Lubricate suspension components as recommended by the manufacturer to prevent squeaks and friction.
• Check wheel alignment periodically and adjust as necessary to avoid uneven tire wear.
• Test the vehicle after suspension maintenance to ensure proper functionality and ride comfort.

Reference: Refer to the vehicle's manual for suspension inspection intervals and recommended maintenance procedures.