Bosch Throttle Position Sensor (TPS) - Peugeot 306 GTi-6 (XU10J4RS)
Often the cause of flat spots in acceleration, harsh engine braking, poor MPG and other running problems. The car will run with this sensor unplugged so this can be done to diagnose potential issues. Always test sensor with a multimeter to confirm if the part is faulty. If you don't know how to do this then why not read our how to guide?
This part is available from Peugeot but if you have a local Bosch dealer they should be able to order it in for you for quite a bit cheaper than Peugeot.