Hi John, thank you for reaching out. The answer varies depending on the original specifications of the alternator in your 2013 Acura RDX. We suggest checking your vehicle manual for reference. You can also reach out to your local dealership parts department. Hopefully, they can help. Should you need an alternator with 130 amperes for your vehicle, you can use this link to order this part at a low price today while supplies last: https://www.carparts.com/alternator/denso/np2101231?can=CPAP3648_CSQA_20240616 I hope this helps. Enjoy shopping.