Peugeot 406

Monitor automatic transmission shifting quality from cold start through to operating temperature. | Note: The AL4 automatic gearbox is prone to solenoid failure. If the 'Sport' and 'Snow' lights flash or shifts are violent, expensive valve body work is likely required.

Test all functions on the steering column stalks including indicators, lights, and wipers. | Note: The COM2000 unit (integrated stalk assembly) is a common failure point. Replacements are costly and must be specifically coded to the vehicle's VIN in some revisions.

Listen for 'clunking' or 'knocking' sounds from the rear of the vehicle over small bumps. | Note: Rear suspension bushes and stabilizer links are wear items. While parts are relatively cheap, labor for pressing out old bushes can add up quickly.

Check the instrument cluster for dead pixels or flickering gauges while driving. | Note: Sagem-manufactured instrument clusters on the 406 often suffer from dry solder joints, leading to intermittent failure of the speedometer or tachometer.