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LEGO part 3649: Technic Gear 40 Tooth

Technic Gears6 colours105 sets

LEGO part LEGO part 3649: Technic Gear 40 Tooth

Specifications

Reference3649
CategoryTechnic Gears
MaterialABS plastic
Colours6
Sets105
Listed pieces325
First appearance1995
Latest appearance2026
Element (Light Bluish Gray)6195314 · 4285634
Most common colourLight Bluish Gray
SetopediaData: Rebrickable
Spec sheet updated on 2026-09-29

LEGO part 3649, Technic Gear 40 Tooth, belongs to the Technic Gears category. It exists in 6 colours and appears in 105 sets of our database, from 1995 to 2026, for a total of 325 listed pieces. Its most common colour is Light Bluish Gray.

Number 3649 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 6195314.

Part 3649 through the years

The oldest set in our database that contains part 3649 is 9609 Technology Resource Set, released in 1995 in the Educational and Dacta theme. It is still in use: the most recent set featuring it, 42238 Ducati Desmo450 MX Factory Motorcycle, dates from 2026.

Its peak year is 2003, with 10 sets containing it. The set with the most copies is 2000431 Connections Kit: 30 copies, against an average of 3.1 per set.

It is spread across several themes, led by Educational and Dacta (37%), Technic (15%) and FIRST LEGO League (8%). With 105 sets, it ranks no. 1,086 of 2,731 parts in our database and no. 15 of 46 in the Technic Gears category.

Sets containing part 3649, by period

PeriodSets
1995-199916
2000-200941
2010-201938
2020-202610

Colours of part 3649

Its rarest colour, black, appears only in set 8523 Blaster / Blaster Slizer.

Colour (element ID)SetsPiecesExample sets
Light Bluish Gray6195314 · 428563467197753314213076398
Light Gray3649022372847984598464
Red4120108824954420004022000400
Green4120109728200040220004009649
White41201072373988501
Black4142058118523

Where to buy part 3649

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

Search part 3649 on AmazonPick a Brick (lego.com)BrickLink entryRebrickable entry

Sets that include part 3649

Sets ranked by popularity that include at least one part 3649, in any colour.

Often found with part 3649

Parts that share the most sets with part 3649, based on set inventories.

More parts in the Technic Gears category

All parts in the Technic Gears category

Frequently asked questions

How many LEGO sets include part 3649?

Part 3649 (Technic Gear 40 Tooth) appears in 105 sets listed on Setopedia, from 1995 to 2026, in any colour.

Which LEGO set contains the most copies of part 3649?

Set 2000431 Connections Kit, released in 2013, contains 30 copies, the highest count in our database. On average, a set containing part 3649 has 3.1.

Which colours does LEGO part 3649 come in?

6 colours are listed for part 3649. The most common is Light Bluish Gray, found in 67 sets.

What is the rarest colour of part 3649?

According to our inventories, it is black, found in only 1 set (8523 Blaster / Blaster Slizer).

What is the element ID of part 3649 in light bluish gray?

In light bluish gray, part 3649 has element ID 6195314 or 4285634. Number 3649 is the mould number, the same for every colour.

Is LEGO part 3649 still used in recent sets?

Yes: it appears in sets released in 2026, such as 42238 Ducati Desmo450 MX Factory Motorcycle.

Where can I buy LEGO part 3649 individually?

Single parts 3649 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.