A spillable battery, named directly
The listing does not hedge on this one. A lead acid battery, car or otherwise, does not travel in the mail to the United Kingdom, independent of size, weight or how it is packed.
Car parts, United Kingdom
Twelve inches is the only thing between this box and the UK
A boxed front bumper cover clears the United Kingdom's postal length line with four inches to spare, then runs twelve inches past the combined length-and-girth line in the same box, on the same measurement. USPS's own country listing for the United Kingdom, read 2026-08-21, supplies both numbers, alongside a flat ban this listing carries that the last country we checked did not.
UK listing, read 2026-08-21Newark hop quoted liveOne flat battery ban, quoted
One line clears, the other doesn't
The same box can pass a length ceiling and still fail a combined-girth ceiling in the same country's own listing.
The box against the UK's own numbers
USPS's Individual Country Listing for the United Kingdom, read on pe.usps.com 2026-08-21, allows a Priority Mail International parcel 66 lb of weight, 60 inches of length, and 108 inches of combined length and girth. Run a boxed front bumper cover for a Honda Civic, packed to 56 × 20 × 12 in at 20 lb, through those three lines and it clears two of them.
| Measurement | This box | USPS limit to the UK | Where it lands |
|---|---|---|---|
| Length | 56 in | 60 in | Clear, by 4 |
| Length plus girth 56 + 2×(20+12) | 120 in | 108 in | Over, by 12 |
| Weight | 20 lb | 66 lb | Clear |
The United Kingdom shares its 108-inch combined-size ceiling with Canada's listing on this site's companion guide, so the same bumper box misses both destinations by the identical 12 inches, even though the two countries set different maximum lengths. Girth, not length, keeps failing this shape of box, and a narrower carton — standing the panel on edge rather than laying it flat — is what would close a 12-inch gap this size.
The rule that rules out one common part outright
Ahead of any size question, the UK's own listing, read in full on 2026-08-21, names a category flatly barred from the mail: lead acid batteries, with the listing's own example reading car batteries specifically. That line was not present on the last country's listing this site checked for auto parts, and it is worth knowing before a used starter battery gets boxed for this route.
What's left over for parts
A clean, dry body panel, a plastic trim piece or a sealed factory part carries none of this restriction. It runs into the size lines above, not the battery ban.
Domestic rules differ
A car battery ships domestically within the US under its own set of rules, covered on our car battery guide. Crossing into the UK's mail system is a separate, stricter question from moving one across state lines.
Priced live: the short hop to Newark
A part headed to the UK typically travels as a domestic parcel to a forwarder first, with the export booking arranged separately from there. Newark sits close to the port and airport infrastructure that handles a large share of the region's transatlantic freight, and it is a short hop from our own Berkeley Heights, NJ origin, so that is the leg we quoted, captured against production on 2026-08-21.
What we typed
used front bumper cover for a Honda Civic, boxed
Packed box
56 × 20 × 12 in
20 lb packed
Route
Berkeley Heights, NJ 07922
to Newark, NJ 07114
A twelve-mile hop, quoted live — the label ends at the forwarder's door, not at the border.
| Carrier | Service | Price | Quoted transit |
|---|---|---|---|
| UPS | Ground Saver | $58.88 | about 3 business days |
| FedEx | Ground Economy | $62.06 | 3-4 business days |
| UPS | Ground | $65.44 | 3-4 business days |
| UPS | 3 Day Select | $69.29 | 3-4 business days |
| UPS | 2nd Day Air | $91.04 | 3-4 business days |
No row above buys the Atlantic crossing or repeals the girth line — what it buys is the first booking of two, with a real captured figure attached. Notice how tight the band is compared with a coast-to-coast forwarder run: because Newark sits close to Berkeley Heights, even UPS 2nd Day Air lands in the same 3-to-4 business day window as the cheaper ground tiers, so the premium here buys almost nothing.
Where these rules come from
- USPS, Individual Country Listing: United Kingdom — the 66 lb, 60 in and 108 in Priority Mail International limits, the lead acid battery prohibition, and the customs form requirement. Read 2026-08-21.
- Price: a single production-checkout capture, 2026-08-21, Berkeley Heights, NJ 07922 to Newark, NJ 07114 — what checkout returned that day, not a rate card.
USPS revises country listings without notice. The numbers above are what the listing stated on 2026-08-21, not a promise that they still hold on the day a box actually ships, so the source is worth a second visit first.
Common questions
Can you ship car parts from the US to the UK?
The border crossing is not something SMKlog sells; our checkout produces United States domestic labels only. What we priced instead is the leg to a Newark, NJ forwarder near the port and airport gateways most transatlantic freight moves through: our own boxed bumper cover ran $58.88 to $91.04, captured 2026-08-21.
Does a boxed car part fit the UK's own mail size limit?
On length, yes. USPS's country listing for the United Kingdom, read 2026-08-21, sets Priority Mail International's maximum length at 60 inches and its combined length-and-girth ceiling at 108 inches. Our 56 x 20 x 12 in bumper cover clears the length line by 4 inches, then misses the girth line by 12 — the same 12-inch miss this site found on the identical box against Canada's listing, a coincidence of the two countries sharing the same 108-inch ceiling.
Are car batteries allowed in the mail to the UK?
No. The UK's own country listing, read 2026-08-21, names lead acid batteries, giving the example of car batteries specifically, among the items barred from the mail outright. A used starter battery pulled for parts is not a candidate for this route regardless of its size or weight.
How much does the domestic leg to a UK-bound forwarder cost?
$58.88 to $91.04 for the bumper cover above, Berkeley Heights, NJ to Newark, NJ, captured 2026-08-21 - a narrow band because the whole domestic hop is short. Every service we quoted, including UPS 2nd Day Air, landed inside a 3-to-4 business day window; a nearby forwarder city compresses the usual gap between ground and air pricing.
What paperwork does a UK-bound part need at the border?
USPS's listing, read 2026-08-21, calls for PS Form 2976-A inside PS Form 2976-E for a Priority Mail International parcel to the UK - the same customs-form pairing this site has found on other Priority Mail International destinations, since the form is tied to the postal product, not the country.