The 1946 Desoto S-11 has 5 electrical parts with verified fitment on this page — 3 part types and 4 brands, covering the 3.9L 237cid L6 engine. Each part includes a manufacturer part number and application notes.
On the 1946 Desoto S-11, the electrical system covers charging, starting and the sensors and modules the vehicle relies on, from alternator and starter to oxygen sensors. All 5 listed parts are Alternator / Generator End Bearing (3 parts), Alternator / Generator Brush (1 part) and Voltage Regulator (1 part).
The 1946 Desoto S-11 came with a single engine, the 3.9L 237cid L6, and every part is verified against it.
4 brands supply electrical parts for the 1946 Desoto S-11, led by STANDARD MOTOR PRODUCTS (2 parts), WJB / INMOTION PARTS (1 part) and BCA (1 part), plus 1 more brand. Quality grades include Standard Replacement and Economy.
Each part number listed for the 1946 Desoto S-11 opens a page with every vehicle that part fits.
Alternator / Generator Brush
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS | EX57 | 🇺🇸 US | Thickness (In): 1/4Width (In): 7/8 | View on Amazon |
This table covers the brushes inside the alternator.
This group shows a single part: STANDARD MOTOR PRODUCTS EX57.
Alternator / Generator End Bearing
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WJB / INMOTION PARTS | RB6203 | 🇺🇸 US | Open DesignExcept Heavy Duty | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| BCA | NB203 | 🇺🇸 US | Except Heavy DutyDrive End | View on Amazon |
| NATIONAL | 203 | 🇺🇸 US | Except Heavy DutyOpen Design | View on Amazon |
This table covers the bearings in the alternator housing. Typical signs include a growl that rises with speed, or play in the shaft or hub. Set preload the way the notes specify. A dry or crushed bearing fails quickly.
3 Alternator / Generator End Bearing parts are listed for the 1946 Desoto S-11, from WJB / INMOTION PARTS, BCA and NATIONAL.
In the Economy grade, WJB / INMOTION PARTS supplies 1 part: the catalog's value-priced group. A representative part number is WJB / INMOTION PARTS RB6203.
The Standard Replacement section lists 2 options from BCA and NATIONAL — built to original-equipment specification. BCA NB203 is listed in this group.
This group includes WJB / INMOTION PARTS RB6203, BCA NB203 and NATIONAL 203.
Voltage Regulator
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS | VR2 | 🇺🇸 US | View on Amazon |
This table covers the regulators that control alternator output voltage.
One part is listed for the 1946 Desoto S-11 — STANDARD MOTOR PRODUCTS VR2.
Buying Electrical Parts for a 1946 Desoto S-11
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 3.9L 237cid L6 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: Alternator / Generator End Bearing and Alternator / Generator Brush .
Frequently Asked Questions
How many electrical parts fit the 1946 Desoto S-11?
Our catalog currently lists 5 electrical parts for the 1946 Desoto S-11 across 3 subcategories and 4 brands, covering the 3.9L 237cid L6 engine. Each part is matched to the engine(s) it fits.
What are the signs of electrical problems on a 1946 Desoto S-11?
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 1946 Desoto S-11 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 1946 Desoto S-11?
Every part on this page is matched to the 3.9L 237cid L6 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 1946 Desoto S-11
Electrical Parts for Other Desoto S-11 Years
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