- CarParts.com sells millions of OEM and aftermarket parts online at prices that generally undercut brick-and-mortar stores by 15-30%.
- Their fitment guarantee means you'll get the right part for your vehicle, but shipping times (3-7 business days) lag behind competitors with physical locations.
- Best for planned maintenance and common repairs. Not the place to shop if your car is broken down in the driveway and you need a part today.
What CarParts.com Actually Is (and Isn't)
CarParts.com is an online-only auto parts retailer that's been around since 1995, originally under the name U.S. Auto Parts Network. They've rebranded, redesigned, and slowly built themselves into one of the bigger players in the online parts game. They stock over 1 million SKUs covering everything from brake pads and headlights to engine components and suspension parts.
What they aren't is a parts store you can walk into. There's no counter. No guy in a red vest who can look up your part and hand it to you in five minutes. That's the single biggest thing to understand before you shop here. If you need a part right now, CarParts.com isn't your answer. But if you can wait a few days and want to pay less, they're worth a serious look.
The company is publicly traded (PRTS on NASDAQ), ships from multiple warehouses across the U.S., and has built a reputation for aggressive pricing. They carry both OEM (original equipment manufacturer) and aftermarket parts, which gives you options at different price points for the same repair.
OEM vs. Aftermarket: What You're Actually Buying
This is where a lot of first-time online parts shoppers get confused. CarParts.com sells both OEM and aftermarket parts, and the price gap between them can be massive.
OEM Parts
These are parts made by (or for) the original vehicle manufacturer. An OEM brake rotor for a 2019 Honda Civic is the same spec as what Honda put on at the factory. On CarParts.com, OEM parts typically run 10-20% less than dealership pricing. That's a real savings, but you're still paying a premium over aftermarket.
For example, an OEM headlight assembly for a 2018 Toyota Camry might run $180-$250 on CarParts.com versus $280-$350 at the dealer. That's meaningful money, especially on a repair you're doing yourself.
Aftermarket Parts
Aftermarket parts are made by third-party manufacturers. Quality varies wildly. Some aftermarket brands (like Moog for suspension, or Bosch for ignition) are just as good as OEM. Others are cheap knockoffs that'll last six months. CarParts.com carries a huge range, which is both a strength and a risk.
That same Toyota Camry headlight in aftermarket? You might find it for $45-$90. That's a fraction of OEM pricing. But you need to know what you're getting. The $45 headlight from an unknown brand probably won't have the same beam pattern or seal quality as the $90 option from TYC or Depo.
The bottom line on OEM vs. aftermarket: If you're keeping the car long-term or the part affects safety (brakes, steering, suspension), lean OEM or premium aftermarket. If you're fixing up a beater or replacing cosmetic parts, aftermarket saves you real money.
Pricing: How Much You'll Actually Save
CarParts.com's main pitch is price, and they mostly deliver on it. Here's how they stack up on some common parts (aftermarket pricing, approximate):
- Front brake pads (2017 Ford F-150): $25-$45 on CarParts.com vs. $35-$60 at AutoZone
- Alternator (2016 Chevy Malibu): $85-$140 vs. $120-$200 at O'Reilly
- Catalytic converter (2015 Honda Accord): $150-$300 vs. $250-$500 at a dealership
- Tail light assembly (2019 Toyota RAV4): $35-$70 vs. $55-$90 at Advance Auto
- Radiator (2018 Nissan Altima): $60-$110 vs. $90-$160 at local parts stores
The pattern holds across most categories. You're saving somewhere between 15% and 40% on aftermarket parts compared to brick-and-mortar retailers. On OEM parts, the savings are smaller (10-20%) but still real.
One catch: those prices don't include shipping unless you hit the free shipping threshold (typically $99 or more). A $25 brake pad order with $8 shipping suddenly isn't such a steal. More on that later.
The Brands They Carry
CarParts.com stocks parts from hundreds of manufacturers. Some are excellent. Some are mediocre. Knowing which brands to trust makes a big difference in your experience.
Brands Worth Buying
- Moog (steering and suspension): Industry standard for ball joints, tie rods, and control arms. Often recommended by professional mechanics.
- Bosch (ignition, fuel systems, wipers): German engineering, consistent quality. Their spark plugs and oxygen sensors are solid picks.
- TYC (lighting): Reliable aftermarket headlights and tail lights. Not OEM quality, but close enough for most people.
- Dorman (everything): They make replacement parts for just about anything. Quality is generally good, especially for hard-to-find components.
- Monroe/Gabriel (shocks and struts): Both are trusted names in ride control. Monroe OESpectrum is a great mid-range choice.
- ACDelco (GM vehicles): The OEM supplier for General Motors. If you drive a Chevy, Buick, or GMC, this is the brand to pick.
Brands to Be Cautious About
CarParts.com also carries a lot of house brands and no-name manufacturers. You'll see listings where the brand is just “CarParts.com” or something generic. These parts are usually fine for low-stress applications (interior trim clips, weatherstripping, minor brackets), but I'd avoid them for anything critical. A $12 generic water pump might save you $30 upfront, but if it fails at 15,000 miles, you're doing the job twice.
Shipping: The Good and the Frustrating
This is CarParts.com's biggest weakness, and they know it. Standard shipping takes 3-7 business days. That's fine if you're planning ahead. It's terrible if your car won't start and you need a starter motor before Monday.
Shipping Costs
- Free shipping: On orders over $99 (this threshold occasionally drops to $75 during sales)
- Standard shipping: $5.99-$9.99 for most parts under the free threshold
- Expedited shipping: Available but expensive. Expect $15-$30 depending on part size and weight.
- Oversized items (bumpers, hoods, radiators): May have additional freight charges of $20-$50
Shipping Speed
CarParts.com ships from warehouses in California, Texas, and the eastern U.S. If you're near one of those hubs, you might get your order in two to three days. If you're in a rural area or far from a warehouse, budget the full week.
They don't offer same-day or next-day delivery in most areas. This is where local parts stores have an undeniable advantage. AutoZone, O'Reilly, and Advance Auto can get you a part in your hands within an hour. That matters when your car is up on jack stands.
The Fitment Guarantee
One of CarParts.com's best features is their fitment guarantee. When you enter your year, make, model, and engine size, the site filters results to show only parts that fit your vehicle. If a part is listed as compatible and it doesn't fit, they'll cover the return.
This is a bigger deal than it sounds. Anyone who's ordered the wrong part online knows the pain of paying return shipping on a 15-pound alternator. CarParts.com's guarantee takes that risk off the table, as long as you entered your vehicle info correctly.
The catch: The guarantee only applies if the part was listed as fitting your vehicle on their site. If you override the filter or manually search by part number without confirming fitment, you're on your own. Always double-check before you hit “add to cart.”
Return Policy: What to Expect
CarParts.com offers a 60-day return window on most parts. That's more generous than many competitors (AutoZone gives you 90 days in-store, but online returns are more restrictive). Here's how it works:
- Unused, unopened parts: Full refund within 60 days. You'll need to request a return authorization first.
- Defective parts: Covered under warranty. They'll send a replacement or issue a refund. Return shipping is on them for defective items.
- Wrong part (your mistake): You can return it, but you'll pay return shipping. This can be $10-$25 depending on the part's size and weight.
- Wrong part (their mistake): Covered by the fitment guarantee. Free return.
- Electrical parts and special-order items: Some restrictions apply. Check the listing before buying.
Returns aren't as painless as walking into AutoZone with a receipt. You'll need to package the part, print a label, and drop it at a carrier. The refund typically takes 5-10 business days after they receive the part. It's not bad, but it's not instant either.
The Downsides (And They're Real)
No retailer is perfect, and CarParts.com has some legitimate weaknesses you should know about before you order.
No In-Person Support
If you're not sure what part you need, there's no counter person to help you diagnose the problem. Their website has a live chat and phone support, but the quality varies. Sometimes you get a knowledgeable rep. Sometimes you get someone reading from a script. If you're a DIY beginner who needs hand-holding, a local parts store is a better experience.
Quality Inconsistency
Because they carry so many brands and price points, you can end up with a part that looks right in the photo but feels cheap in your hands. The product photos don't always match what arrives. Read the reviews on each specific listing, not just the overall brand rating.
Shipping Delays
Despite what the listing says about stock availability, some parts ship from third-party warehouses and can take longer than expected. I've seen complaints about orders sitting in “processing” for two to three days before they even ship. If your repair is time-sensitive, build in extra buffer.
Customer Service Can Be Hit or Miss
Their Trustpilot and BBB reviews are a mixed bag. You'll find plenty of five-star reviews from people who got exactly what they needed at a great price. But you'll also find one-star reviews about wrong parts shipped, slow refunds, and difficulty reaching support. This is fairly common for large online retailers, but it's worth knowing going in. Keep your order confirmation emails and take photos when your parts arrive.
Who Should Shop at CarParts.com
CarParts.com is best suited for a specific type of buyer. Here's who benefits most:
- DIY mechanics who know what part they need and want the lowest price
- Fleet owners doing planned maintenance and buying parts in bulk (stacking orders over $99 for free shipping)
- People with older vehicles where OEM parts are discontinued or overpriced at dealers
- Cosmetic repairs like headlights, mirrors, bumper covers, and trim pieces where aftermarket quality is acceptable
And here's who should probably shop elsewhere:
- Anyone who needs a part today. Go to AutoZone or O'Reilly.
- Beginners who aren't sure what part they need. A counter person at a local store will save you headaches.
- People doing safety-critical repairs who want guaranteed OEM quality and a face-to-face warranty experience.
The bottom line
CarParts.com is a legitimate, well-established online parts retailer that consistently beats local store pricing by 15-30% on aftermarket parts. Their selection is massive, the fitment guarantee reduces the risk of ordering the wrong thing, and the 60-day return policy is reasonable. For planned repairs and maintenance where you know what you need, it's hard to beat the value.
But it's not without tradeoffs. You're giving up same-day availability, in-person help, and the ability to eyeball a part before buying it. Shipping times can be slow, customer service is inconsistent, and quality depends heavily on which brand you choose from their massive catalog. You need to be a somewhat informed shopper to get the best results here.
If you know your car, know your part number, and can wait three to five days for delivery, CarParts.com will save you real money on almost every repair. Just don't expect the hand-holding experience of a local parts counter.
