30 Electrical parts are listed for the 2020 Toyota Prius, in 8 part types, covering the 1.8L L4 ELECTRIC/GAS engine. Each one has a brand, a manufacturer part number and notes that say where it fits.
The electrical system on the 2020 Toyota Prius covers charging, starting and the sensors and modules the vehicle relies on, from alternator and starter to oxygen sensors. The largest groups are Parking Aid Sensor (11 parts), Horn (7 parts) and Battery (4 parts). The other 5 part types cover the remaining 8 parts.
Every part on this page is matched to the 1.8L L4 ELECTRIC/GAS — the only engine offered in the 2020 Toyota Prius.
The most listed brands for 2020 Toyota Prius electrical parts are STANDARD MOTOR PRODUCTS (13 parts), FIAMM (7 parts) and BOSCH (1 part), plus 9 more brands. Quality grades include Accessory Replacement and Standard Replacement.
5 parts on this 2020 Toyota Prius page carry a "Popular" badge — the source catalog's flag for options frequently chosen for this vehicle — including FIAMM 72112 (Horn) and STANDARD MOTOR PRODUCTS PPS166 (Parking Aid Sensor). Click any part number to see every vehicle that part fits.
Battery
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| BOSCH | S6566B | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | AGM | View on Amazon |
| DEKA | 9A140R | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | IntimidatorAGM | View on Amazon |
| FVP | PLN1AGM | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Platinum AGMBCI Group: 140R | View on Amazon |
| MOTORCRAFT | BAGMH4 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Tested Tough AGM or Tested Tough MAX SeriesBCI Group 140R or BCI Group: 99R | View on Amazon |
This table covers the batteries listed by group size and specification. Typical signs include slow cranking, a battery lamp, or a no-start after the vehicle sat overnight. Confirm group size and terminal layout in the notes. Clean the posts and the ground before condemning the battery.
4 Battery parts for the 2020 Toyota Prius come from 4 brands — BOSCH, DEKA, FVP and 1 other brand.
Part numbers include BOSCH S6566B, DEKA 9A140R and FVP PLN1AGM, among others listed above.
Battery Air Filter
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WIX | WP11025 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon |
This table covers the Battery Air filters. Typical signs include restricted flow — long cranking, weak airflow, or dirty fluid after a short interval. Seat the new filter so it cannot bypass, and use the grade the notes call for.
This group shows a single part: WIX WP11025.
Battery Cooling Fan
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| FOUR SEASONS | 76809 | 🇺🇸 US 🇨🇦 CA | Prius AWD-e | View on Amazon |
| GPD | 2312075 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Drive Motor Battery Pack Cooling Fan AssemblyUse with NiMH Battery System | View on Amazon |
This table covers the Battery Cooling fans. Typical signs include overheating at idle, a fan that never comes on, or a blade that hits the shroud. Confirm the fan command and the relay before replacing the assembly.
2 Battery Cooling Fan parts for the 2020 Toyota Prius come from 2 brands — FOUR SEASONS and GPD.
This group includes FOUR SEASONS 76809 and GPD 2312075.
Battery Current Sensor
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WELLS | 5S17121 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Prius Base Modelwith 2 Connectors | View on Amazon |
This table covers the Battery Current sensors. Typical signs include a warning lamp, a stored code, or a reading that drops out when the harness is wiggled. Inspect the connector and ground before replacing the sensor — wiring faults are often condemned as bad sensors.
One part is listed for the 2020 Toyota Prius — WELLS 5S17121.
Battery Terminal
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| BECK/ARNLEY | 2060001 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | POSITIVEFor 12 Volt Battery | View on Amazon |
| DORMAN | 926515 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Prius Base ModelPositive Terminal | View on Amazon |
| STANDARD MOTOR PRODUCTS | BP100P | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Top post, straight, positive | View on Amazon |
This table covers the terminals and clamps that connect cables to the battery posts.
3 Battery Terminal parts for the 2020 Toyota Prius come from 3 brands — BECK/ARNLEY, DORMAN and STANDARD MOTOR PRODUCTS.
Listed part numbers: BECK/ARNLEY 2060001, DORMAN 926515 and STANDARD MOTOR PRODUCTS BP100P.
Horn
Accessory Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| FIAMM Popular | 72112 | 🇺🇸 US 🇨🇦 CA | Freeway BlasterAccessory Horn | View on Amazon |
| FIAMM | 7410024 | 🇺🇸 US 🇨🇦 CA | Accessory HornEl Grande | View on Amazon |
| FIAMM | 6602023 | 🇺🇸 US 🇨🇦 CA | Accessory HornRed | View on Amazon |
| FIAMM | 6602523 | 🇺🇸 US 🇨🇦 CA | Accessory HornChrome | View on Amazon |
| FIAMM | 6604523 | 🇺🇸 US 🇨🇦 CA | Ultimate Blast HornAccessory Horn | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| FIAMM Popular | 7421122 | 🇺🇸 US 🇨🇦 CA | OE Replacement Horn KitIncludes OE Connectors & L Bracket | View on Amazon |
| FIAMM | 7421322 | 🇺🇸 US 🇨🇦 CA | OE Replacement Horn KitIncludes OE Connectors | View on Amazon |
This table covers the horns mounted in the front of the vehicle.
7 Horn parts for the 2020 Toyota Prius come from FIAMM. The "Popular" part is FIAMM 72112.
The Accessory Replacement section lists 5 options from FIAMM — grouped under the catalog's "Accessory Replacement" designation — the notes column spells out what sets them apart. FIAMM 72112 is listed in this group.
In the Standard Replacement grade, FIAMM supplies 2 parts: built to original-equipment specification. A representative part number is FIAMM 7421122.
Part numbers include FIAMM 72112, FIAMM 7410024 and FIAMM 6602023, among others listed above.
Hybrid Battery Voltage Sensor
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS | BSC35 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | with 2 Connectors | View on Amazon |
This table covers the Hybrid Battery Voltage sensors. Typical signs include a warning lamp, a stored code, or a reading that drops out when the harness is wiggled. Inspect the connector and ground before replacing the sensor — wiring faults are often condemned as bad sensors.
This group shows a single part: STANDARD MOTOR PRODUCTS BSC35.
Parking Aid Sensor
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Popular | PPS166 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Fits White PearlFront Sid | View on Amazon |
| STANDARD MOTOR PRODUCTS Popular | PPS169 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Gray | View on Amazon |
| STANDARD MOTOR PRODUCTS Popular | PPS164 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Fits RearSILVER | View on Amazon |
| STANDARD MOTOR PRODUCTS | PPS217 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Fits Front InnerColor Code Midnight Black Metallic | View on Amazon |
| STANDARD MOTOR PRODUCTS | PPS218 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Fits Front OuterColor Code Midnight Black Metallic | View on Amazon |
| STANDARD MOTOR PRODUCTS | PPS104 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Rear InnerPrius Base Model | View on Amazon |
| STANDARD MOTOR PRODUCTS | PPS163 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | White | View on Amazon |
| STANDARD MOTOR PRODUCTS | PPS165 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Gray | View on Amazon |
| STANDARD MOTOR PRODUCTS | PPS167 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Fits Front SideColor Code Super White | View on Amazon |
| STANDARD MOTOR PRODUCTS | PPS168 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Fits Rear OuterSilveror Classic Silver Metallic | View on Amazon |
| STANDARD MOTOR PRODUCTS | PPS170 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Front Inner | View on Amazon |
This table covers the ultrasonic park-aid sensors in the bumper. Typical signs include a warning lamp, a stored code, or a reading that drops out when the harness is wiggled. Inspect the connector and ground before replacing the sensor — wiring faults are often condemned as bad sensors.
STANDARD MOTOR PRODUCTS supplies the 11 Parking Aid Sensor parts for the 2020 Toyota Prius. STANDARD MOTOR PRODUCTS PPS166 carries the "Popular" badge.
Buying Electrical Parts for a 2020 Toyota Prius
On this vehicle, the electrical system covers charging, starting and the sensors and modules the vehicle relies on, from alternator and starter to oxygen sensors.
- Confirm you have the 1.8L L4 ELECTRIC/GAS engine — every part on this page is matched to it.
- Read the notes on each row for position, trim and spec qualifiers before you order.
- Where labor overlaps, clean or renew the battery terminals and grounds with any charging-system repair.
- Cross-reference the manufacturer part number against your old part or a service-manual listing.
Start with the largest groups on this page: Parking Aid Sensor and Horn .
Frequently Asked Questions
How many electrical parts fit the 2020 Toyota Prius?
Our catalog currently lists 30 electrical parts for the 2020 Toyota Prius across 8 subcategories and 12 brands, covering the 1.8L L4 ELECTRIC/GAS engine. Each part is matched to the engine(s) it fits.
What are the signs of electrical problems on a 2020 Toyota Prius?
Common symptoms include slow cranking on cold mornings, a battery light that flickers, dim lights at idle, or a check-engine code pointing at a sensor circuit. If you notice any of these, identify the affected subcategory above and cross-reference the part numbers listed.
What should I replace at the same time?
Where labor overlaps, clean or renew the battery terminals and grounds with any charging-system repair.
What do the market flags (US, CA, MX) on each part mean?
They show the market for which the manufacturer published application data for that part — where the vehicle was first sold, not where the part was made. If your 2020 Toyota Prius was originally sold in the US, the safest choice is a part marked for the US market.
How do I make sure a part fits my 2020 Toyota Prius?
Every part on this page is matched to the 1.8L L4 ELECTRIC/GAS engine. Then test before replacing — a failed alternator and a bad ground can look identical, and sensors are frequently condemned for wiring faults. The notes column carries position and trim qualifiers where they apply.
Other Parts for the 2020 Toyota Prius
Electrical Parts for Other Toyota Prius Years
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