This page lists 10 electrical parts for the 1957 Triumph TR3A, across 4 part types, covering the 2.0L L4 engine. Every part shows its brand, manufacturer part number and fitment notes.
On the 1957 Triumph TR3A, the electrical system covers charging, starting and the sensors and modules the vehicle relies on, from alternator and starter to oxygen sensors. 9 parts of the 10 listed are Alternator / Generator (5 parts), Alternator / Generator End Bearing (3 parts) and Battery (1 part). The other 1 part type covers the remaining 1 part.
Every part on this page is matched to the 2.0L L4 — the only engine offered in the 1957 Triumph TR3A.
The most listed brands for 1957 Triumph TR3A electrical parts are WAI GLOBAL (1 part), FVP (1 part) and PURE ENERGY (1 part), plus 7 more brands. Quality grades include Remanufactured, Standard Replacement and Economy.
1 part on this 1957 Triumph TR3A page carries a "Popular" badge — the source catalog's flag for options frequently chosen for this vehicle — WAI GLOBAL 15017N (Alternator / Generator). Click any part number to see 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 are listed for the 1957 Triumph TR3A, from WAI GLOBAL, FVP, PURE ENERGY and 2 other brands. WAI GLOBAL 15017N carries the "Popular" badge.
In the New grade, WAI GLOBAL supplies 1 part: brand-new units rather than rebuilt ones. A representative part number is WAI GLOBAL 15017N.
In the Remanufactured grade, FVP, PURE ENERGY, REMY and 1 other brand supply 4 parts: factory-rebuilt units with new wear components. A representative part number is FVP 15017.
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 | Open Designwith Lucas Alternator | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| BCA | NB202 | 🇺🇸 US | 22 Ampswith Lucas, C40 Alternator | View on Amazon |
| NATIONAL | 202 | 🇺🇸 US | 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 for the 1957 Triumph TR3A come from 3 brands — WJB / INMOTION PARTS, BCA and NATIONAL.
The Economy section lists 1 option from WJB / INMOTION PARTS — the catalog's value-priced group. WJB / INMOTION PARTS RB6202 is listed in this group.
In the Standard Replacement grade, BCA and NATIONAL supply 2 parts: built to original-equipment specification. A representative part number is BCA NB202.
This group includes WJB / INMOTION PARTS RB6202, BCA NB202 and NATIONAL 202.
Battery
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| BOSCH | T631P | 🇺🇸 US | AGMValve Regulated | 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.
This group shows a single part: BOSCH T631P.
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.
This group shows a single part: METRO RP1.
Buying Electrical Parts for a 1957 Triumph TR3A
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 Alternator / Generator End Bearing .
Frequently Asked Questions
How many electrical parts fit the 1957 Triumph TR3A?
Our catalog currently lists 10 electrical parts for the 1957 Triumph TR3A across 4 subcategories and 10 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 TR3A?
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 TR3A 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 TR3A?
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 TR3A
Electrical Parts for Other Triumph TR3A 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.