Search by number: 2002 Audi TT Coupe & TT Quattro 1.8L Alternator ProAmp 13853 $170.00 each OPTIONS: 120 Amp Bosch Unit ProAmp 13942 $174.00 each OPTIONS: 120 Amp Hitachi Unit ProAmp 13947 $176.00 each OPTIONS: 120 Amp Valeo Unit ProAmpN 13853N $218.00 each OPTIONS: 120 Amp Bosch Unit Why is there more than one unit for my car? Look at the TECH SPECS when more than one unit is shown for your car. AMPS (ELECTRIC CAPACITY): must match you vehicle electric requirements. *** Call us if you are looking to increase your unit capacity! OE ALTERNATOR MANUFACTURER: It is recommended to match the Make of your alternator