High Output Alternator for the 2014-2019 Toyota Corolla 1.8L
The 2014-2019 Corolla is a reliable daily driver and a common starting point for audio builds, but its factory charging system leaves little room for extra amplifiers or lighting. This JS Alternators high output alternator is a direct fit for the stock alternator location on the 1.8L. It uses a 14.8-volt GM-style internal regulator and connects with a pigtail plug, so plan for a little wiring during installation (see the plug notes below).
Fits these model years:
- 2014 Toyota Corolla 1.8L
- 2015 Toyota Corolla 1.8L
- 2016 Toyota Corolla 1.8L
- 2017 Toyota Corolla 1.8L
- 2018 Toyota Corolla 1.8L
- 2019 Toyota Corolla 1.8L
Available output: 250 amp or 320 amp.
Why upgrade? A quick load check
A 1,000-watt RMS amplifier can draw roughly 80 to 100 amps at full output. Add the car's own lighting, cooling fans and electronics, and a factory alternator runs out of headroom quickly, especially at idle. The 250 amp option suits most single-amplifier systems; choose 320 amp for larger builds.
Want more detail? Read our alternator sizing guide.
Fitment:
This is a direct fit high-output alternator for the 2014-2019 Toyota Corolla 1.8L. Being a direct fit, this alternator fits directly into your stock alternator location.
Plug:
This high-output alternator comes with a 14.8 Volt GM Style Internal Regulator with pigtail plug. This alternator is not plug-and-play and must be wired with a pigtail plug.
NOTE: If you require charging at a certain voltage setpoint, we offer a selection of different voltage regulators that you will need to purchase with the alternator for it to be installed. Individual regulator options (verify compatibility and charging voltage): 14.8V Internal (Pigtail) | 14.8V Self-Excite | 15.5V Lithium | 16V Lithium | GM 1-Wire
Pulley:
This alternator also comes with a smaller pulley, which causes it to spin faster than a larger pulley. This can help the alternator produce its maximum output. With a smaller pulley, it is required to install a 1/2" - 1" shorter belt.
Part numbers for shorter belt:
- (2014-2018 Gas Naturally Aspirated K, U) Dayco part number: 5060480
- (2014-2018 Gas Naturally Aspirated K, U) Metric part number: 6pk1220
- (2014-2018 Gas Naturally Aspirated P) Dayco part number: 5060475
- (2014-2018 Gas Naturally Aspirated P) Metric part number: 6pk1205
- (2019 Gas Naturally Aspirated U) Dayco part number: 5060480
- (2019 Gas Naturally Aspirated U) Metric part number: 6pk1220
- (2019 Gas Aspirated) (M20A-FKS) Dayco part number: 5060433
- (2019 Gas Aspirated) (M20A-FKS) Metric part number: 6pk1100
- (2019 Gas Aspirated) (2ZR-FAE) Dayco part number: 5060475
- (2019 Gas Aspirated) (2ZR-FAE) Metric part number: 6pk1205
See this Blog Article for assistance in finding the correct shorter belt.
Big 3 Wiring:
When Upgrading to a High-Output Alternator, it is required to upgrade your wiring with the Big 3 Wiring Upgrade Kit (choose a cable length: 4ft 1/0 positive cable kit / 6ft 1/0 positive cable kit / 10.5ft 1/0 positive cable kit / 20ft 2/0 positive cable kit). It is recommended to use 1/0 100% copper wires for the upgrade.
Learn Why The Big 3 Wiring Upgrade Kit is Required for All High Output Alternators
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We also offer financing options to make purchasing easier. Learn more about our financing options here.
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If you have any questions or need assistance with payments, feel free to reach out to us at info@bigjeffaudio.com or call us at 737-BIG-JEFF.
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Yes! At checkout, you can select from different shipping options:
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