The 2021 Honda Insight has 5 electrical parts with verified fitment on this page — 1 part type and 5 brands, covering the 1.5L L4 ELECTRIC/GAS engine. Each part includes a manufacturer part number and application notes.
The electrical system on the 2021 Honda Insight covers charging, starting and the sensors and modules the vehicle relies on, from alternator and starter to oxygen sensors. Every listed part is a Battery.
Every part on this page is matched to the 1.5L L4 ELECTRIC/GAS — the only engine offered in the 2021 Honda Insight.
The most listed brands for 2021 Honda Insight electrical parts are ACDELCO (1 part), BOSCH (1 part) and DEKA (1 part), plus 2 more brands.
Each part number listed for the 2021 Honda Insight opens a page with every vehicle that part fits.
Battery
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ACDELCO | 51RAGM | 🇺🇸 US 🇨🇦 CA | AGMBCI Group: 51R | View on Amazon |
| BOSCH | S6594B | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | AGM | View on Amazon |
| DEKA | 9A51RT | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | AGMIntimidator | View on Amazon |
| EXIDE | MX51R | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Marathon MaxBCI Group 51R | View on Amazon |
| FVP | P51RAGM | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Platinum AGM | 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.
5 Battery parts for the 2021 Honda Insight come from 5 brands — ACDELCO, BOSCH, DEKA and 2 other brands.
This group includes ACDELCO 51RAGM, BOSCH S6594B and DEKA 9A51RT and the remaining parts above.
Buying Electrical Parts for a 2021 Honda Insight
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 1.5L 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: Battery .
Frequently Asked Questions
How many electrical parts fit the 2021 Honda Insight?
Our catalog currently lists 5 electrical parts for the 2021 Honda Insight across 1 subcategory and 5 brands, covering the 1.5L L4 ELECTRIC/GAS engine. Each part is matched to the engine(s) it fits.
What are the signs of electrical problems on a 2021 Honda Insight?
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 2021 Honda Insight 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 2021 Honda Insight?
Every part on this page is matched to the 1.5L 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 2021 Honda Insight
Electrical Parts for Other Honda Insight Years
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Manufacturer names, model designations and part numbers are used for identification and fitment reference only. AutoFactsDB is an independent catalog and is not affiliated with, endorsed by, or sponsored by any vehicle manufacturer displayed on this page.