The 2023 Lexus IS300 has 19 electrical parts with verified fitment on this page — 5 part types and 13 brands, covering both the 2.0L L4 Turbocharged and the 3.5L V6. Each part includes a manufacturer part number and application notes.
The electrical system on the 2023 Lexus IS300 covers charging, starting and the sensors and modules the vehicle relies on, from alternator and starter to oxygen sensors. The largest groups are Battery (5 parts), Starter Motor (5 parts) and Alternator / Generator (4 parts). The other 2 part types cover the remaining 5 parts.
The 2023 Lexus IS300 was sold with both the 2.0L L4 Turbocharged and the 3.5L V6. Every part on this page is engine-specific. Each part shows which engine(s) it fits.
The most listed brands for 2023 Lexus IS300 electrical parts are WAI GLOBAL (2 parts), REMY (2 parts) and TERREPOWER (2 parts), plus 10 more brands. Quality grades include Remanufactured and New.
2 parts on this 2023 Lexus IS300 page carry a "Popular" badge — the source catalog's flag for options frequently chosen for this vehicle — including DEKA 9A78DT (Battery) and PURE ENERGY 19634 (Starter Motor). Click any part number to see every vehicle that part fits.
Alternator / Generator
New
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| TYC Fits: 2.0L L4 Turbocharged | 211944 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | 170 Amps | View on Amazon |
| WAI GLOBAL Fits: 2.0L L4 Turbocharged | 11944N | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | 155 Amps | View on Amazon |
Remanufactured
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| REMY Fits: 2.0L L4 Turbocharged | 11236 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Remanufactured | View on Amazon |
| TERREPOWER Fits: 2.0L L4 Turbocharged | 42091 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Remanufactured | View on Amazon |
This table covers the alternators that charge the battery and run the electrical load. Typical signs include dim lights at idle, a battery lamp, or a growl from the charging pulley. Load-test the battery and inspect the belt and grounds — a bad ground mimics a failed alternator.
4 Alternator / Generator parts are listed for the 2023 Lexus IS300, from TYC, WAI GLOBAL, REMY and 1 other brand.
In the New grade, TYC and WAI GLOBAL supply 2 parts: brand-new units rather than rebuilt ones. A representative part number is TYC 211944.
In the Remanufactured grade, REMY and TERREPOWER supply 2 parts: factory-rebuilt units with new wear components. A representative part number is REMY 11236.
Listed part numbers: TYC 211944, WAI GLOBAL 11944N and REMY 11236, plus the other parts above.
Battery
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DEKA Popular Fits: 2.0L L4 Turbocharged | 9A78DT | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | IntimidatorAGM | View on Amazon |
| DEKA Fits: 2.0L L4 Turbocharged | 9A34 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | IntimidatorAGM | View on Amazon |
| EXIDE Fits: 2.0L L4 Turbocharged | MX24 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Marathon MaxBCI Group 24 | View on Amazon |
| FULLRIVER Fits: 2.0L L4 Turbocharged | FT84024M | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | AGMBCI Group 24 | View on Amazon |
| FVP Fits: 2.0L L4 Turbocharged | P24AGM | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Platinum AGMBCI Group: 24 | 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 2023 Lexus IS300 come from 4 brands — DEKA, EXIDE, FULLRIVER and 1 other brand. The "Popular" part is DEKA 9A78DT.
Part numbers include DEKA 9A78DT, DEKA 9A34 and EXIDE MX24, among others listed above.
Fuse
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| BUSSMANN Fits: 2.0L L4 Turbocharged | MPF2534X | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | 50, 30, 40 Amp534 Amps | View on Amazon |
| BUSSMANN Fits: 2.0L L4 Turbocharged | MPF2555X | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | 50 AmpsColor Maroon | View on Amazon |
This table covers the replacement fuses for this vehicle's fuse boxes. Typical signs include one circuit dead while its neighbor still works, or a fuse that blows again as soon as you replace it. Match amperage and fuse type. A repeat blow means a short — find it before the next fuse.
2 Fuse parts for the 2023 Lexus IS300 come from BUSSMANN.
This group includes BUSSMANN MPF2534X and BUSSMANN MPF2555X.
Speed Sensor
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DELPHI Fits: 2.0L L4 Turbocharged | SS12424 | 🇺🇸 US 🇨🇦 CA | All Required Transmission Speed | View on Amazon |
| DELPHI Fits: 2.0L L4 Turbocharged | SS12490 | 🇺🇸 US 🇨🇦 CA | Transmission Speed | View on Amazon |
| STANDARD MOTOR PRODUCTS Fits: 2.0L L4 Turbocharged | SC590 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Transmission SpeedInput | View on Amazon |
This table covers the speed sensors on the transmission, transfer case or ABS ring. Typical signs include a dead speedometer, harsh transmission shifts, or a code for vehicle speed. Inspect the tone wheel and the connector before replacing the sensor.
3 Speed Sensor parts for the 2023 Lexus IS300 come from 2 brands — DELPHI and STANDARD MOTOR PRODUCTS.
This group includes DELPHI SS12424, DELPHI SS12490 and STANDARD MOTOR PRODUCTS SC590.
Starter Motor
New
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WAI GLOBAL Fits: 2.0L L4 Turbocharged | 16371N | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon |
Remanufactured
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PURE ENERGY Popular Fits: 2.0L L4 Turbocharged | 19634 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Remanufactured | View on Amazon |
| DENSO Fits: 2.0L L4 Turbocharged | 2800461 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Reman | View on Amazon |
| REMY Fits: 2.0L L4 Turbocharged | 16302 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Remanufactured | View on Amazon |
| TERREPOWER Fits: 2.0L L4 Turbocharged | 52119 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Remanufactured | View on Amazon |
This table covers the starter motors that crank the engine. Typical signs include no motion, a squeal, or a motor that only runs on one speed. Confirm power, ground and the control module before replacing the motor.
5 Starter Motor parts are listed for the 2023 Lexus IS300, from WAI GLOBAL, PURE ENERGY, DENSO and 2 other brands. PURE ENERGY 19634 carries the "Popular" badge.
New: 1 part, from WAI GLOBAL. A representative part number is WAI GLOBAL 16371N.
Remanufactured: 4 parts, from PURE ENERGY, DENSO, REMY and 1 other brand. A representative part number is PURE ENERGY 19634.
Listed part numbers: PURE ENERGY 19634, WAI GLOBAL 16371N and DENSO 2800461, plus the other parts above.
Buying Electrical Parts for a 2023 Lexus IS300
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.
- Match the engine first. Every electrical part here is engine-specific; each row shows which engine(s) it fits.
- 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 and Starter Motor .
Frequently Asked Questions
How many electrical parts fit the 2023 Lexus IS300?
Our catalog currently lists 19 electrical parts for the 2023 Lexus IS300 across 5 subcategories and 13 brands, covering both the 2.0L L4 Turbocharged and the 3.5L V6. Each part is matched to the engine(s) it fits.
Do electrical parts differ between 2023 Lexus IS300 engines?
Yes. Every electrical part on this page is engine-specific. Each row shows which engine(s) it fits — use the filter at the top to hide the rest. If you're unsure which engine you have, check the emissions label under the hood or the 8th character of your VIN.
What are the signs of electrical problems on a 2023 Lexus IS300?
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 2023 Lexus IS300 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 2023 Lexus IS300?
First match the engine — each row shows which engine(s) the part fits. 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 2023 Lexus IS300
Electrical Parts for Other Lexus IS300 Years
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