Through 3/21 Advance Auto Parts is offering a $50 off your $125 purchase when you use promo code WD511 at checkout! If you’ve been planning to buy some new batteries or alternators be sure to use the promo code for some nice savings! And since Shipping is Free on $75+ orders you’ll get Free Shipping as well! Coupon code is valid on regular-priced merchandise only and excludes some items and categories.