The 1957 Triumph TR3A has one listed interior part: a Jack Plug Cover from METRO, covering the 2.0L L4 — the only engine offered in the 1957 Triumph TR3A. It includes a manufacturer part number and application notes.
On the 1957 Triumph TR3A, the interior covers cabin hardware — seat components, handles, switch bezels, carpet, pedals and the pieces that take daily wear.
The part number opens a page with every vehicle that part fits.
Jack Plug Cover
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| METRO | RP91 | 🇺🇸 US 🇨🇦 CA | Sold Individually | View on Amazon |
This table covers the Jack Plug covers.
One part is listed for the 1957 Triumph TR3A — METRO RP91.
Buying Interior Parts for a 1957 Triumph TR3A
On this vehicle, the interior covers cabin hardware — seat components, handles, switch bezels, carpet, pedals and the pieces that take daily wear.
- 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, replace the retainer clips with any panel removal — they are cheap insurance against squeaks.
- Cross-reference the manufacturer part number against your old part or a service-manual listing.
Start with the largest groups on this page: Jack Plug Cover .
Frequently Asked Questions
How many interior parts fit the 1957 Triumph TR3A?
This page lists one interior part for the 1957 Triumph TR3A: a Jack Plug Cover from METRO, covering the 2.0L L4 engine.
What are the signs of interior problems on a 1957 Triumph TR3A?
Common symptoms include a door handle that works only from outside, sagging headliner, a window switch that needs two presses, or seat adjusters that stick. 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, replace the retainer clips with any panel removal — they are cheap insurance against squeaks.
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 interior plastics are often color- and trim-specific — check the notes column against your trim level before ordering. The notes column carries position and trim qualifiers where they apply.
Other Parts for the 1957 Triumph TR3A
Interior Parts for Other Triumph TR3A Years
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