The move has prompted speculation that a similar section will follow on its UK website. However, Amazon has declined to reveal its plans.
The US site now claims to offer customers more than one million new, used and remanufactured parts, which can be identified by entering the year, make and model of their vehicle.
Amazon.co.uk will not confirm whether the service will be rolled out in the UK but it may consider the move following the success of eBay Motors.
Since its launch in August, eBay Motors has received more than three million unique visitors every month.
A vehicle part or accessory is sold every 11 seconds, with more than 100,000 vehicle parts, accessories and manuals available from UK sellers at any one time.