Setobrick

LEGO part 43121: Engine, Large

Transportation - Sea and Air8 colours52 sets

LEGO part LEGO part 43121: Engine, Large

Specifications

Reference43121
CategoryTransportation - Sea and Air
MaterialABS plastic
Colours8
Sets52
Listed pieces89
First appearance2002
Latest appearance2020
Element (Light Bluish Gray)4211767
Most common colourLight Bluish Gray
SetopediaData: Rebrickable
Spec sheet updated on 2026-09-29

LEGO part 43121, Engine, Large, belongs to the Transportation - Sea and Air category. It exists in 8 colours and appears in 52 sets of our database, from 2002 to 2020, for a total of 89 listed pieces. Its most common colour is Light Bluish Gray.

Number 43121 identifies the shape and is moulded under the part. Each colour also has its own element ID, the one Pick a Brick uses: in light bluish gray, it is 4211767.

Part 43121 through the years

The oldest set in our database that contains part 43121 is 4620 A.I.R. Operations HQ, released in 2002 in the 4 Juniors theme. No set in our database uses it after 2020, the year of 30464 El Fuego's Stunt Cannon. To get it today, look for older sets or buy it second-hand.

Its peak year is 2019, with 5 sets containing it. The set with the most copies is 60022 Cargo Terminal: 4 copies, against an average of 1.7 per set.

It is spread across several themes, led by Super Heroes DC (19%), City (17%) and Star Wars (10%). With 52 sets, it ranks no. 1,618 of 2,731 parts in our database and no. 18 of 43 in the Transportation - Sea and Air category.

Sets containing part 43121, by period

PeriodSets
2002-200920
2010-201930
20202

Colours of part 43121

4 colours appear in only one set: orange (4619 A.I.R. Patrol Jet), light gray (4403 Air Blazers), dark purple (41230 Batgirl Batjet Chase) and reddish brown (70834 MetalBeard's Heavy Metal Motor Trike!).

Colour (element ID)SetsPiecesExample sets
Light Bluish Gray4211767244360022793175934
Black42953952032706777501876117
White6109875 · 417178124411094620
Red6064186 · 456951323318241231
Orange4171113134619
Light Gray4171112124403
Dark Purple61723841141230
Reddish Brown62488571170834

Where to buy part 43121

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

Search part 43121 on AmazonPick a Brick (lego.com)BrickLink entryRebrickable entry

Sets that include part 43121

Sets ranked by popularity that include at least one part 43121, in any colour.

Related parts

More parts in the Transportation - Sea and Air category

All parts in the Transportation - Sea and Air category

Frequently asked questions

How many LEGO sets include part 43121?

Part 43121 (Engine, Large) appears in 52 sets listed on Setopedia, from 2002 to 2020, in any colour.

Which LEGO set contains the most copies of part 43121?

Set 60022 Cargo Terminal, released in 2013, contains 4 copies, the highest count in our database. On average, a set containing part 43121 has 1.7.

Which colours does LEGO part 43121 come in?

8 colours are listed for part 43121. The most common is Light Bluish Gray, found in 24 sets.

What is the rarest colour of part 43121?

According to our inventories, it is dark purple, found in only 1 set (41230 Batgirl Batjet Chase).

What is the element ID of part 43121 in light bluish gray?

In light bluish gray, part 43121 has element ID 4211767. Number 43121 is the mould number, the same for every colour.

Is LEGO part 43121 still used in recent sets?

Not in our database: its last set dates from 2020 (30464 El Fuego's Stunt Cannon). Look for it in second-hand sets or on BrickLink.

Where can I buy LEGO part 43121 individually?

Single parts 43121 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.