Are OEM Subaru Alternators Better Than Aftermarket?
If your Subaru’s alternator is faulty or failing, you may be wondering whether an aftermarket part will do the same job as an OEM component. In most cases, non-original components are never a good idea.
When it comes to complex parts like an alternator, only an OEM part will do. In this blog we will explain why this is the case and compare the main differences between OEM and aftermarket components.
OEM Vs. Aftermarket Alternators

OEM stands for Original Equipment Manufacturer. Parts with the OEM label are identical to the components that were fitted to the vehicle at the factory. They need to pass strict quality controls and match the original component in size and functionality.
Aftermarket parts are built by companies that are not associated with the manufacturer. These components are loosely based on the original. However, they do not need to meet any of the manufacturer’s specifications, and the result is that they vary in performance and quality.
Quality And Reliability
- Compatibility and correct fitment
- Lifespan considerations
- Product warranty and backup
OEM Subaru alternators are designed to work with specific Subaru models. This means that they will fit perfectly and work exactly like the original part. An OEM part needs to pass strict manufacturer standards. This ensures a longer service life and lower running costs.
Aftermarket components are never the same. That’s because each supplier will have differing production methods and quality controls. This means that every time you fit a non-genuine part, it is anyone’s guess of how well it will work or how long it will last.
Price Vs. Value
- Aftermarket parts are built to be cheap
- OEM parts are built to a high standard and tend to last far longer
Most people consider an aftermarket component because they think it will be a cheaper solution. While the upfront price may be a bit lower, you are paying for a part that is built down to a price. That means lower quality components and a higher likelihood of early failure.
OEM items can cost more than aftermarket parts, but at Subaru Parts Plus we sell all our original components at wholesale prices. This makes the price difference marginal. And once you factor in the higher quality and better warranty of OEM parts, they are by far the superior choice.
Choose Subaru Parts Plus For Your OEM Alternator

Image Credit: TheDIYGuyDOTnet
If you need a new alternator for your Subaru, then always replace it with an OEM part from Subaru Parts Plus. We have been supplying quality OEM Subaru parts since 2005. Every part we sell is genuine, sold at wholesale prices, and comes with Subaru’s manufacturer warranty.
We stock a full range of alternators and alternator accessories. We have the perfect OEM replacement brackets, pulleys, and cable assemblies for whatever model Subaru you drive.
Our staff are as passionate about Subarus as you are. We are available to help you online or over the phone at 1-888-294-4979. If you have alternator issues, get in touch today, and let us find you the perfect OEM replacement part.