Setobrick

LEGO part 3821: Door 1 x 3 x 1 Right

Windows and Doors19 colours260 sets

LEGO part LEGO part 3821: Door 1 x 3 x 1 Right

Specifications

Reference3821
CategoryWindows and Doors
MaterialABS plastic
Colours19
Sets260
Listed pieces348
First appearance1995
Latest appearance2026
Element (White)4537987 · 4527638
Most common colourWhite
Main themesCity, Town, Friends
SetopediaData: Rebrickable
Spec sheet updated on 2026-09-29

LEGO part 3821, Door 1 x 3 x 1 Right, belongs to the Windows and Doors category. It exists in 19 colours and appears in 260 sets of our database, from 1995 to 2026, for a total of 348 listed pieces. Its most common colour is White.

Number 3821 identifies the shape and is moulded under the part. Each colour also has its own element ID, the one Pick a Brick uses: in white, it is 4537987.

Part 3821 through the years

The oldest set in our database that contains part 3821 is 4555 Cargo Station, released in 1995 in the Train theme. It is still in use: the most recent set featuring it, 11377 The Lord of the Rings: Minas Tirith, dates from 2026.

Its peak year is 2014, with 20 sets containing it. The set with the most copies is 10294 Titanic: 22 copies, against an average of 1.3 per set.

It is spread across several themes, led by City (48%), Town (13%) and Friends (4%). With 260 sets, it ranks no. 603 of 2,731 parts in our database and no. 10 of 76 in the Windows and Doors category.

Sets containing part 3821, by period

PeriodSets
1995-199939
2000-200922
2010-2019133
2020-202666

Colours of part 3821

4 colours appear in only one set: dark green (10133 Burlington Northern Santa Fe Locomotive), bright light blue (41053 Cinderella's Dream Carriage), maersk blue (1831 Maersk Line Container Lorry) and light gray (6598 Metro PD Station).

Colour (element ID)SetsPiecesExample sets
White4537987 · 45276387590762181029410275
Red4537986 · 42882087079603471027560414
Blue4586547 · 41415853033602926013960223
Yellow6587459 · 45379852830601506009760073
Black6024113 · 41415872643769107062076916
Orange6185053 · 45453131414600366023360017
Green45679141212600526016960059
Light Bluish Gray60782111014752521029475935
Lime620746044602544134572005
Reddish Brown63658842111029410354
Dark Bluish Gray6436222 · 421920423769154504
Dark Tan6369260227694176951
Dark Red6527930226045443277
Bright Light Orange6595734226049460478
Tan6608949221137760512
Dark Green42644101310133
Bright Light Blue60559481241053
Maersk Blue111831
Light Gray382102116598

Where to buy part 3821

Setopedia shows no prices: they vary by colour, condition and seller. Amazon links are affiliate links.

Search part 3821 on AmazonPick a Brick (lego.com)BrickLink entryRebrickable entry

Sets that include part 3821

Sets ranked by popularity that include at least one part 3821, in any colour.

Related parts

Often found with part 3821

Parts that share the most sets with part 3821, based on set inventories.

More parts in the Windows and Doors category

All parts in the Windows and Doors category

Frequently asked questions

How many LEGO sets include part 3821?

Part 3821 (Door 1 x 3 x 1 Right) appears in 260 sets listed on Setopedia, from 1995 to 2026, in any colour.

Which LEGO set contains the most copies of part 3821?

Set 10294 Titanic, released in 2021, contains 22 copies, the highest count in our database. On average, a set containing part 3821 has 1.3.

Which colours does LEGO part 3821 come in?

19 colours are listed for part 3821. The most common is White, found in 75 sets.

What is the rarest colour of part 3821?

According to our inventories, it is maersk blue, found in only 1 set (1831 Maersk Line Container Lorry).

What is the element ID of part 3821 in white?

In white, part 3821 has element ID 4537987 or 4527638. Number 3821 is the mould number, the same for every colour.

Is LEGO part 3821 still used in recent sets?

Yes: it appears in sets released in 2026, such as 11377 The Lord of the Rings: Minas Tirith.

Where can I buy LEGO part 3821 individually?

Single parts 3821 can be ordered on Pick a Brick (lego.com) in colours currently produced, or on BrickLink for older colours. The part is also included in the sets listed on this page.