The 1957 Triumph TR3 has 14 electrical parts with verified fitment on this page — 4 part types and 12 brands, covering the 2.0L L4 engine. Each part includes a manufacturer part number and application notes.
On the 1957 Triumph TR3, the electrical system covers charging, starting and the sensors and modules the vehicle relies on, from alternator and starter to oxygen sensors. Most of the listed parts are Alternator / Generator (5 parts), Battery (5 parts) and Alternator / Generator End Bearing (3 parts). The other 1 part type covers the remaining 1 part.
The 1957 Triumph TR3 came with a single engine, the 2.0L L4, and every part is verified against it.
12 brands supply electrical parts for the 1957 Triumph TR3, led by FVP (3 parts), WAI GLOBAL (1 part) and PURE ENERGY (1 part), plus 9 more brands. Quality grades include Remanufactured, Standard Replacement and Economy.
A "Popular" badge means the source catalog flagged the part as frequently chosen for the 1957 Triumph TR3. 2 parts have it, including WAI GLOBAL 15017N (Alternator / Generator) and FVP P24AGM (Battery). Each part number opens a page with every vehicle that part fits.
Alternator / Generator
New
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WAI GLOBAL Popular | 15017N | 🇺🇸 US | Does Not Include Pulley | View on Amazon |
Remanufactured
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| FVP | 15017 | 🇺🇸 US | RemanufacturedDoes Not Include Pulley | View on Amazon |
| PURE ENERGY | 15017 | 🇺🇸 US | RemanufacturedDoes Not Include Pulley | View on Amazon |
| REMY | 15017 | 🇺🇸 US | Premium RemanufacturedDoes Not Include Pulley | View on Amazon |
| TERREPOWER | 15017 | 🇺🇸 US | RemanufacturedDoes Not Include Pulley | 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.
5 Alternator / Generator parts for the 1957 Triumph TR3 come from 5 brands — WAI GLOBAL, FVP, PURE ENERGY and 2 other brands. The "Popular" part is WAI GLOBAL 15017N.
The New section lists 1 option from WAI GLOBAL — brand-new units rather than rebuilt ones. WAI GLOBAL 15017N is listed in this group.
The Remanufactured section lists 4 options from FVP, PURE ENERGY, REMY and 1 other brand — factory-rebuilt units with new wear components. FVP 15017 is listed in this group.
Part numbers include WAI GLOBAL 15017N and FVP 15017, among others listed above.
Alternator / Generator End Bearing
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WJB / INMOTION PARTS | RB6202 | 🇺🇸 US 🇨🇦 CA | Open Designwith Lucas Alternator | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| BCA | NB202 | 🇺🇸 US 🇨🇦 CA | 22 Ampswith Lucas, C40 Alternator | View on Amazon |
| NATIONAL | 202 | 🇺🇸 US 🇨🇦 CA | Open Designwith Lucas Alternator | 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 1957 Triumph TR3, 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 RB6202.
The Standard Replacement section lists 2 options from BCA and NATIONAL — built to original-equipment specification. BCA NB202 is listed in this group.
This group includes WJB / INMOTION PARTS RB6202, BCA NB202 and NATIONAL 202.
Battery
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| FVP Popular | P24AGM | 🇺🇸 US | Platinum AGMBCI Group: 24 | View on Amazon |
| BOSCH | T631P | 🇺🇸 US | AGMValve Regulated | View on Amazon |
| EXIDE | MX24 | 🇺🇸 US | Marathon MaxBCI Group 24 | View on Amazon |
| FULLRIVER | FT84024M | 🇺🇸 US | AGMBCI Group 24 | View on Amazon |
| FVP | P24RAGM | 🇺🇸 US | 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 are listed for the 1957 Triumph TR3, from FVP, BOSCH, EXIDE and 1 other brand. FVP P24AGM carries the "Popular" badge.
Listed part numbers: FVP P24AGM, BOSCH T631P and EXIDE MX24, plus the other parts above.
Starter Solenoid Switch Cover
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| METRO | RP1 | 🇺🇸 US 🇨🇦 CA | Sold IndividuallyReproduction | View on Amazon |
This table covers the Starter Solenoid Switch covers.
One part is listed for the 1957 Triumph TR3 — METRO RP1.
Buying Electrical Parts for a 1957 Triumph TR3
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 2.0L L4 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 and Battery .
Frequently Asked Questions
How many electrical parts fit the 1957 Triumph TR3?
Our catalog currently lists 14 electrical parts for the 1957 Triumph TR3 across 4 subcategories and 12 brands, covering the 2.0L L4 engine. Each part is matched to the engine(s) it fits.
What are the signs of electrical problems on a 1957 Triumph TR3?
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 1957 Triumph TR3 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 1957 Triumph TR3?
Every part on this page is matched to the 2.0L L4 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 1957 Triumph TR3
Electrical Parts for Other Triumph TR3 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.