10 Ways to Save: Up to $500 Off

AutoZone, O'Reilly, and Advance Auto Parts all run free battery and charging-system load tests. Batteries fail roughly three times more often than alternators on cars 5+ years old. If the test shows a weak battery, you avoid the entire alternator job.

Call three shops, ask for an estimate on alternator replacement for your year/make/model with a new aftermarket part. Spread between highest and lowest quote is typically $150 to $300. Twenty to thirty minutes of phone time, paid back at $300 to $600 per hour of effort.

Independent shops charge 25 to 40% less than dealers on out-of-warranty alternator work. The mechanic's skill is comparable on common vehicles. Use the dealer when the vehicle is in factory warranty, has an active recall, or is a complex European model.

A reman from Denso, Bosch, or ACDelco runs about 90% as reliable as new and saves $100 to $300 on total cost. Best value on vehicles 5+ years old or where the budget is tight.

Many independent shops install customer-supplied parts. Buying from RockAuto or AutoZone often beats the shop's parts markup by $50 to $150. Caveat: some shops reduce or void labor warranty on customer-supplied parts. Ask first.

If the serpentine belt is past 60,000 miles, replace it during alternator work. Part is $20 to $50; extra labor is near zero because the belt is already off. A standalone belt visit later costs $150 to $250.

Firestone, Midas, and Pep Boys regularly run service coupons. Check the chain's website, RetailMeNot, and Groupon before booking. A 10% off any service coupon saves $50 to $75 on a typical alternator job.

YourMechanic, Wrench, and similar services come to your driveway and typically charge 10 to 20% less than a brick-and-mortar shop because of lower overhead. Convenient when the car will not start.

On Japanese compacts and most American trucks, DIY alternator replacement is a 1- to 2-hour job that saves the entire labor charge. Skip on European luxury cars where the labor saved disappears under the time cost.

Some bumper-to-bumper factory warranties cover alternator replacement (typically through 3 yr / 36k mi). Some extended-warranty plans cover the full job. Some credit cards (Chase Sapphire, Amex Platinum) extend manufacturer warranty by 1 to 2 years on a part purchased on the card.