
You can buy replacement seat belts for a car carrier (also known as a car top carrier or roof basket) from several types of retailers. The most reliable sources are automotive parts stores like AutoZone, Advance Auto Parts, and O'Reilly Auto Parts, both online and in-person. Online marketplaces such as Amazon and eBay offer a wide selection, and specialty automotive websites like etrailer.com are excellent for finding model-specific parts. For carriers from major brands like Thule or Yakima, purchasing directly from their official websites ensures perfect compatibility.
The most critical step is verifying compatibility before you buy. Seat belts are not universal. You need to know the brand and model of your carrier. The attachment system—whether it uses bolts, a specific buckle style, or a quick-release mechanism—varies significantly. A belt that is too short or has the wrong connectors will not work.
When shopping, prioritize belts that meet safety standards. Look for specifications indicating heavy-duty nylon webbing and corrosion-resistant hardware (like stainless steel) to withstand weather exposure. Installation is typically straightforward, often requiring just a socket wrench to secure the new belts in place of the old ones.
| Retailer Type | Examples | Key Consideration |
|---|---|---|
| Major Auto Parts Stores | AutoZone, Advance Auto Parts | Potential for immediate in-store pickup. |
| Online Marketplaces | Amazon, eBay | Wide variety; carefully check seller ratings and product reviews. |
| Specialty Automotive Sites | etrailer.com, JCWhitney.com | Often have detailed fit guides and customer support. |
| Manufacturer Direct | Thule.com, Yakima.com | Guaranteed compatibility, but can be more expensive. |
| Big-Box Retailers | Walmart, Target | Limited selection, but may have generic options. |

Check the manufacturer's website first. I had to replace one on my Yakima rack, and their customer service was able to identify the exact part number I needed based on the carrier's model name. I ordered it right from their site, and it fit perfectly. If it's a generic or older carrier, your best bet is a site like etrailer.com. They have a huge inventory and good diagrams to help you find the right strap and buckle combination. It's less about the "seat belt" and more about finding the correct tie-down strap for that specific piece of gear.

Head to a local auto parts store. I just did this for my cousin's carrier. Take the old belt with you, or at least a clear photo of how it attaches. The staff can usually point you to a suitable replacement if it's a common type. If they don't have it, they can often order it. It's faster than waiting for shipping if you need it fixed for a trip this weekend. Just make sure the new one is the same length and has the same metal hooks.

For a quick and often cheaper solution, Amazon is your friend. Search for "replacement strap for [Your Carrier Brand] carrier." You'll find tons of options. The key is to read the reviews carefully—look for reviews from people who have the same model as you. I've found that the third-party straps are just as good as the OEM ones for a simple job like this. Just double-check the length and the type of clasp against your old one before clicking "buy."

Don't overcomplicate it. These aren't special-order items. If you need a basic, universal strap, places like Walmart or Harbor Freight sell packs of ratcheting tie-down straps that will work in a pinch. They may not be a sleek, exact match, but they'll get the job done securely for a short haul. For a permanent, like-for-like replacement, then I'd go the online specialty route. But for a temporary fix, the big-box store option is cheap, easy, and immediate.


