How many pieces does the LEGO Cat D11 Bulldozer (42131-1) have?

The LEGO Cat D11 Bulldozer set (42131-1) contains 3854 pieces. It was released in 2021 as part of the LEGO Technic theme.

How can I find missing parts for LEGO set 42131-1?

On BrickMissing you can check which parts from the LEGO Cat D11 Bulldozer (42131-1) you already own. Add your LEGO collection and we'll show exactly which of the 3854 pieces you're missing and which you already have.

Can I build the LEGO Cat D11 Bulldozer with parts I already have?

Use BrickMissing's free parts checker to find out. Add LEGO sets you own to your collection and we'll cross-reference all 3854 parts to show your buildability percentage and which specific pieces you still need.

What theme is the LEGO Cat D11 Bulldozer from?

The LEGO Cat D11 Bulldozer (42131-1) belongs to the LEGO Technic theme. You can browse all Technic sets on BrickMissing to find more sets from this theme.

Cat D11 Bulldozer

🏷️ 42131-1•🎨 Technic•📅 2021•🧱 3854 parts•Expert

The LEGO Technic App-Controlled Cat D11 Bulldozer (42131-1), a 3854-piece model from 2021, replicates the Cat D11 dozer. Its construction uses modular sections, mirroring the actual machine's assembly. A new large track element features in the set, designed for adjustable tension. Control of the bulldozer is achieved via the CONTROL+ app. This app facilitates movement, allowing driving, steering, and manipulation of the blade to raise, lower, and tilt it. The ripper and ladder also raise and lower, showcasing realistic engineering functions. This model provides an exploration of construction technology.

Parts Inventory

🧱 3854 parts

Part	Color	Qty
Plate 3 x 3 11212	Light Bluish Gray	1×
Technic Axle Pin 3L with Friction Ridges Lengthwise and 1L Axle 11214	Red	84×
Slope Curved 2 x 1 No Studs [1/2 Bow] 11477	Light Bluish Gray	1×
Technic Beam 1 x 5 Thin with Axle Holes on Ends 11478	Black	14×
Technic Beam 1 x 5 Thin with Axle Holes on Ends 11478	Yellow	35×
Technic Panel Fairing #21 5L Small Smooth, Side B 11946	Black	2×
Technic Panel Fairing #21 5L Small Smooth, Side B 11946	Yellow	2×
Technic Panel Fairing #22 5L Small Smooth, Side A 11947	Black	2×
Technic Panel Fairing #22 5L Small Smooth, Side A 11947	Yellow	2×
Technic Panel Curved 11 x 3 with 10 Pin Holes through Panel Surface 11954	Yellow	4×

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Technic Panel Fairing #21 5L Small Smooth, Side B	11946	Black	2×
Technic Panel Fairing #21 5L Small Smooth, Side B	11946	Yellow	2×
Technic Panel Fairing #22 5L Small Smooth, Side A	11947	Black	2×
Technic Panel Fairing #22 5L Small Smooth, Side A	11947	Yellow	2×
Technic Panel Curved 11 x 3 with 10 Pin Holes through Panel Surface	11954	Yellow	4×
Wheel 18 x 8 with Fake Bolts and Deep Spokes with Inner Ring	13971	Light Bluish Gray	2×
Technic Beam 3 x 5 Thick [90° Offset Centre Beam Holes]	14720	Yellow	3×
Technic Beam 3 x 5 Thick [90° Offset Centre Beam Holes]	14720	Light Bluish Gray	1×
Slope Curved 2 x 2 x 2/3	15068	Light Bluish Gray	1×
Technic Panel 3 x 11 x 1	15458	Yellow	16×
Technic Panel 3 x 11 x 1	15458	Black	8×
Technic Axle 5 with Stop	15462	Reddish Brown	14×
Tile Round 2 x 2 with Hole	15535	Black	16×
Brick Round 2 x 2, Pin Holes	17485	Black	6×
Technic Gear 20 Tooth Double Bevel with Axle Hole Type 1 [+ Opening]	18575	Tan	6×
Technic Gear 20 Tooth Double Bevel with Axle Hole Type 1 [+ Opening]	18575	Black	3×
Technic Axle Pin 3L with Friction Ridges Lengthwise and 2L Axle	18651	Black	23×
Technic Pin Connector Round 1L [Beam]	18654	Light Bluish Gray	6×
Technic Pin Connector Round 1L [Beam]	18654	White	18×
Technic Pin Connector Round 1L [Beam]	18654	Black	61×
Plate Special Round 2 x 2 with Center Stud (Jumper Plate)	18674	Light Bluish Gray	2×
Plate Special 1 x 2 with Pin Hole Underneath	18677	Black	2×
Plate Special 1 x 2 with Pin Hole Underneath	18677	Light Bluish Gray	6×
Technic Gear Rack 1 x 14 x 2 Housing	18940	Dark Bluish Gray	2×
Technic Gear Rack 1 x 14 x 2 with Axle and Pin Holes	18942	Dark Bluish Gray	2×
Technic Panel 5 x 11 x 1 Tapered	18945	Black	8×
Technic Panel 5 x 11 x 1 Tapered	18945	Yellow	6×
Technic Gear 16 Tooth with Clutch on Both Sides	18946	Red	15×
Technic Driving Ring 3L	18947	Dark Bluish Gray	2×
Motor, Large, Powered Up	22169	Dark Bluish Gray	2×
Technic Axle 11	23948	Light Bluish Gray	7×
Tile Special 1 x 2 Grille with Bottom Groove	2412b	Black	4×
Plate 2 x 2 Corner	2420	Black	2×
Tile 1 x 4 with Groove	2431	Light Bluish Gray	1×
Technic Axle 3 with Stop	24316	Reddish Brown	7×
Plate 2 x 12	2445	Light Bluish Gray	2×
Brick Round 1 x 1 diameter Tube with 90 Degree Elbow (2 x 2 x 1) and Axle Holes (Crossholes) at each end	25214	Light Bluish Gray	6×
Tile 2 x 3	26603	Light Bluish Gray	1×
Technic Axle Towball	2736	Light Bluish Gray	1×
Technic Worm Gear Short	27938	Dark Bluish Gray	3×
Technic Pin Connector Hub with 2 Axles	27940	Dark Bluish Gray	6×
Technic Engine Cylinder without Side Slots, with Bottom Slots	2850b	Light Bluish Gray	12×
Technic Engine Piston Round	2851	Yellow	12×
Technic Engine Connecting Rod	2852	Light Bluish Gray	12×
Technic Engine Crankshaft	2853	Yellow	2×
Technic Engine Crankshaft Center	2854	Tan	5×
Plate 2 x 4	3020	Black	1×
Plate 1 x 1	3024	Black	1×
Tile 1 x 2 with Groove	3069b	Light Bluish Gray	2×
Technic Steering Arm 5 x 1 with Towball Socket (Type2)	31794	Yellow	2×
Technic Pin 3/4	32002	Tan	3×
Technic Beam 1 x 11.5 Double Bent Thick	32009	Yellow	4×
Technic Axle and Pin Connector Angled #1	32013	Light Bluish Gray	4×
Technic Axle and Pin Connector Angled #1	32013	Black	41×
Technic Axle and Pin Connector Angled #6 - 90°	32014	Black	11×
Technic Axle and Pin Connector Angled #5 - 112.5°	32015	Light Bluish Gray	2×
Technic Axle and Pin Connector Angled #2 - 180°	32034	Black	16×
Technic Beam 3 x 3 L-Shape Thin	32056	Black	2×
Technic Beam 3 x 3 L-Shape Thin	32056	Red	1×
Technic Beam 3 x 3 L-Shape Thin	32056	Yellow	3×
Technic Beam 3 x 3 L-Shape Thin	32056	Light Bluish Gray	4×
Technic Axle 2 Notched	32062	Red	104×
Technic Beam 1 x 6 Thin	32063	Yellow	14×
Technic Beam 1 x 6 Thin	32063	Black	8×
Technic Beam 1 x 6 Thin	32063	Light Bluish Gray	4×
Technic Beam 1 x 7 Thin	32065	White	1×
Technic Axle 5	32073	Yellow	44×
Technic Bush 1/2 Smooth with Axle Hole Semi-Reduced	32123b	Yellow	34×
Technic Beam 2 x 4 L-Shape Thick	32140	Yellow	49×
Technic Beam 2 x 4 L-Shape Thick	32140	Black	18×
Technic Beam 2 x 4 L-Shape Thick	32140	Light Bluish Gray	3×
Technic Axle and Pin Connector Perpendicular 3L with Centre Pin Hole	32184	Yellow	18×
Technic Axle and Pin Connector Angled #4 - 135°	32192	Dark Bluish Gray	3×
Technic Gear 20 Tooth Bevel	32198	Tan	24×
Technic Beam 3 x 5 L-Shape with Quarter Ellipse Thin	32250	Dark Bluish Gray	2×
Technic Gear 12 Tooth Double Bevel	32270	Black	17×
Technic Beam 1 x 9 Bent (7 - 3) Thick	32271	Dark Bluish Gray	2×
Technic Beam 1 x 15 Thick	32278	Yellow	20×
Technic Beam 1 x 15 Thick	32278	Black	8×
Technic Axle and Pin Connector Perpendicular Double	32291	Black	9×
Technic Axle and Pin Connector Perpendicular Double	32291	White	2×
Technic Beam 1 x 5 Thick	32316	Light Bluish Gray	12×
Technic Beam 1 x 5 Thick	32316	Black	7×
Technic Beam 1 x 5 Thick	32316	Yellow	30×
Technic Pin Connector Block 1 x 5 x 3	32333	Black	2×
Technic Beam 1 x 7 Bent (4 - 4) Thick	32348	Black	2×
Technic Beam 1 x 7 Bent (4 - 4) Thick	32348	Light Bluish Gray	1×
Technic Beam 1 x 4 Thin	32449	Light Bluish Gray	2×
Technic Beam 1 x 4 Thin	32449	Black	22×
Technic Beam 1 x 3 Thick	32523	Light Bluish Gray	3×
Technic Beam 1 x 3 Thick	32523	Dark Bluish Gray	16×
Technic Beam 1 x 3 Thick	32523	Black	9×
Technic Beam 1 x 3 Thick	32523	Yellow	35×
Technic Beam 1 x 7 Thick	32524	Black	17×
Technic Beam 1 x 7 Thick	32524	Yellow	45×
Technic Beam 1 x 7 Thick	32524	Light Bluish Gray	2×
Technic Beam 1 x 11 Thick	32525	Yellow	18×
Technic Beam 1 x 11 Thick	32525	Light Bluish Gray	5×
Technic Beam 3 x 5 L-Shape Thick	32526	Black	10×
Technic Beam 3 x 5 L-Shape Thick	32526	Light Bluish Gray	13×
Technic Beam 3 x 5 L-Shape Thick	32526	Yellow	30×
Plate Special 1 x 3 with 2 Studs with Groove and Inside Stud Holder (Jumper)	34103	Light Bluish Gray	1×
Technic Driving Ring Extension, 8 Ridges	35186	Yellow	2×
Gear Shifter	35188	Orange	1×
Plate 1 x 3	3623	Black	1×
Plate 1 x 3	3623	Light Bluish Gray	1×
Technic Axle 4	3705	Black	26×
Technic Axle 6	3706	Red	7×
Technic Axle 8	3707	Black	11×
Technic Axle 12	3708	Black	5×
Plate 1 x 4	3710	Light Bluish Gray	2×
Technic Bush	3713	Red	20×
Technic Axle 10	3737	Red	2×
Technic Axle Pin without Friction Ridges Lengthwise	3749	Tan	7×
Brick Round 2 x 2 with Axle Hole	3941	Black	24×
Technic Connector Beam 3 x 3	39793	Yellow	9×
Technic Connector Beam 3 x 3	39793	Black	6×
Technic Beam Frame 7 x 11	39794	Black	1×
Technic Pin Long without Friction Ridges, with Anti-Roll Notch	39888	Tan	6×
Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening)	4032a	Black	16×
Technic Beam 1 x 9 Thick	40490	Light Bluish Gray	8×
Technic Beam 1 x 9 Thick	40490	Black	7×
Technic Beam 1 x 9 Thick	40490	Yellow	9×
Technic Beam 1 x 13 Thick	41239	Black	3×
Technic Beam 1 x 13 Thick	41239	Dark Bluish Gray	11×
Tile 1 x 8 with Groove	4162	Black	1×
Technic Beam 1 x 2 Thin	41677	Black	50×
Technic Wedge Belt Wheel [aka Pulley]	4185	Yellow	6×
Technic Axle and Pin Connector Perpendicular 3L with 2 Pin Holes	42003	Yellow	2×
Technic Axle and Pin Connector Perpendicular 3L with 2 Pin Holes	42003	Black	40×
Technic Axle Connector with Axle Hole [Reinforced]	42135	Dark Bluish Gray	4×
Technic Axle Connector with Axle Hole [Reinforced]	42135	Black	8×
Technic Driving Ring Connector Smooth [2 rounded and 2 flat side walls]	42195	Black	2×
Technic Driving Ring Connector Smooth [2 rounded and 2 flat side walls]	42195	Light Bluish Gray	10×
Technic Tread Sprocket Wheel Large Diameter 7 Holes, 14 Tooth	42529	Yellow	6×
Wheel 11 x 8 with Center Groove	42610	Light Bluish Gray	24×
Technic Pin 1/2	4274	Black	32×
Technic Pin Long with Friction Ridges Lengthwise, 1 Center Slot	42924	Black	390×
Technic Axle Pin with Friction Ridges Lengthwise	43093	Black	150×
Technic Linear Actuator with Dark Bluish Gray Ends [Black Version]	43097	Black	6×
Technic Beam 1 x 2 Thick	43857	Yellow	30×
Technic Beam 1 x 2 Thick	43857	Black	12×
Technic Beam 1 x 2 Thick	43857	Light Bluish Gray	4×
Dish 3 x 3 Inverted [Radar]	43898	Red	2×
Dish 3 x 3 Inverted [Radar]	43898	Black	2×
Technic Axle 7	44294	Light Bluish Gray	14×
Technic Pin Connector Perpendicular 2 x 2 Bent	44809	Black	2×
Technic Pin Connector Hub with 2 Pins with Friction Ridges Lengthwise [Small Squared Pin Holes]	44874	Light Bluish Gray	7×
Technic Axle 3	4519	Light Bluish Gray	98×
Technic Steering Wheel Hub with Planetary Gear Reduction	46490	Light Bluish Gray	2×
Clutch Outer Side with Axle Connector	46834	White	1×
Clutch Inner Side with Axle Connector	46835	Dark Bluish Gray	1×
Technic Pin Connector Hub Perpendicular 3 x 3 Bent with 4 Pins (Pin Ridges Along Part)	49130	Light Bluish Gray	2×
Wire Clip with Axle Hole	49283	Yellow	2×
Wire Clip with Axle Hole	49283	Red	2×
Wire Clip with Axle Hole	49283	Black	1×
Wire Clip with Axle Hole	49283	Light Bluish Gray	1×
Technic Axle 16	50451	Black	2×
Tyre 14 x 6 Solid Smooth	50951	Black	24×
Technic Steering / CV Ball Joint Female 4L	52730	Dark Bluish Gray	2×
Technic Steering / CV Ball Joint Male 3L	52731	Light Bluish Gray	2×
Technic Axle 8 with Stop	55013	Dark Bluish Gray	4×
Technic Axle 5.5 with Stop [Rounded Short End]	59426	Dark Bluish Gray	2×
Technic Axle Connector Smooth [with x Hole + Orientation]	59443	Black	61×
Technic Axle Connector Smooth [with x Hole + Orientation]	59443	Dark Bluish Gray	22×
Wheel 31 x 15 Technic, 7 Pin Holes	60208	Yellow	1×
Technic Beam 1 x 2 Thick with Pin Hole and Axle Hole	60483	Black	38×
Technic Beam 1 x 2 Thick with Pin Hole and Axle Hole	60483	Orange	7×
Technic Beam 3 x 3 T-Shape Thick	60484	Yellow	11×
Technic Axle 9	60485	Yellow	2×
Technic Pin with Friction Ridges Lengthwise with No Center Slots	61332	Black	707×
Plate Round 1 x 1 with Solid Stud	6141	Red	2×
Plate Special 4 x 4 with Studs on One Edge [Plain]	6179	Yellow	1×
Technic Universal Joint 3L [Complete Assembly]	61903	Light Bluish Gray	8×
Technic Axle and Pin Connector Block 4 x 3 x 2 1/2 [Linear Actuator Holder]	61904	Dark Bluish Gray	9×
Technic Pin Connector Round [Slotted]	62462	Flat Silver	2×
Technic Pin Connector Round [Slotted]	62462	Yellow	38×
Technic Gear Differential with Inner Tabs and Closed Center, 28 Bevel Teeth [Beveled Edge]	62821b	Dark Bluish Gray	1×
Tile 1 x 3	63864	Black	1×
Tile 1 x 3	63864	Light Bluish Gray	1×
Technic Axle and Pin Connector Perpendicular Triple	63869	Light Bluish Gray	15×
Technic Beam 5 x 11 with 3 x 5 Opening Frame Thick	64178	Light Bluish Gray	3×
Technic Beam Frame 5 x 7 with 3 x 5 Opening Thick	64179	Yellow	4×
Technic Beam Frame 5 x 7 with 3 x 5 Opening Thick	64179	Light Bluish Gray	6×
Technic Gear Rack 1 x 13 with Axle and Pin Holes	64781	Black	8×
Technic Panel 5 x 11 x 1	64782	Yellow	6×
Technic Pin Long with Friction Ridges Lengthwise and Stop Bush [2 Lateral Holes, Small Pin Hole]	65304	Light Bluish Gray	20×
Technic Pin Long with Friction Ridges Lengthwise and Stop Bush [2 Lateral Holes, Small Pin Hole]	65304	Red	26×
Technic Axle and Pin Connector Perpendicular	6536	Light Bluish Gray	34×
Brick Round 2 x 2 D. Tube with 45° Elbow and Axle Holes (Crossholes) at Each End [SHORT]	65473	Black	2×
Technic Pin Connector Hub with 1 Pin with Friction Ridges Lengthwise [Square Holes]	65487	Yellow	72×
Technic Pin Connector Hub with 1 Pin with Friction Ridges Lengthwise [Square Holes]	65487	Black	12×
Technic Pin Connector Hub Perpendicular 3L with 4 Pins (Squared Holes)	65489	Light Bluish Gray	4×
Technic Axle 3 with Stud	6587	Dark Tan	4×
Technic Gear 12 Tooth Bevel	6589	Tan	18×
Technic Beam 1 x 9 Bent (6 - 4) Thick	6629	Yellow	11×
Technic Beam 1 x 3 Thin	6632	Yellow	27×
Technic Beam 1 x 3 Thin	6632	Black	4×
Technic Pin with Friction Ridges Lengthwise and Towball - Round Pin Hole	66906	Red	5×
Motor, Large Angular Position, Light Bluish Gray Housing, Black Wire	69730	Dark Bluish Gray	2×
Technic Axle and Pin Connector Perpendicular Double Split [Reinforced]	69819	Black	8×
Technic Link Tread 7L Wide with Two Pin Holes	69910	Yellow	116×
Technic Beam 2 x 3 L-Shape with Quarter Ellipse Thick	71708	Yellow	6×
Technic Panel 3 x 7 x 1	71709	Yellow	15×
Technic Panel 3 x 7 x 1	71709	Black	6×
Technic Beam 1 x 15 Thick with Alternating Holes	71710	Black	18×
Technic Beam 1 x 11 Thick with Alternating Holes	73507	Black	22×
Technic Steering / CV Ball Joint, Cardan Ball with Cross Hole 3L	77590	Light Bluish Gray	2×
Sticker Sheet for Set 42131-1	77607	Unknown	1×
Hub, Powered Up 4-Port (Technic Control+) - Screw Opening	85824	Light Bluish Gray	1×
Slope 30? 1 x 2 x 2/3	85984	Light Bluish Gray	3×
Tile 2 x 4 with Groove	87079	Light Bluish Gray	3×
Technic Panel Fairing #1 Small Smooth Short, Side A	87080	Yellow	2×
Technic Axle 4 with Stop	87083	Dark Bluish Gray	26×
Technic Panel Fairing #2 Small Smooth Short, Side B	87086	Yellow	2×
Technic Gear 20 Tooth Bevel with Pin Hole	87407	Light Bluish Gray	2×
Technic Pin Connector Toggle Joint Smooth Double with Axle and Pin Holes	87408	Black	4×
Plate 2 x 14	91988	Light Bluish Gray	1×
Technic Axle and Pin Connector Perpendicular Split	92907	Light Bluish Gray	2×
Technic Axle and Pin Connector Perpendicular Split	92907	Black	2×
Technic Gear 16 Tooth Reinforced [New Style]	94925	Light Bluish Gray	14×
Tile Round 1 x 1	98138	Trans-Clear	10×
Large Figure Weapon, Barrel with 2 Pin Holes and 3 Axle Holes	98585	Red	6×
Technic Turntable Small Top	99009	Light Bluish Gray	4×
Technic Turntable Small Base, 28 Tooth	99010	Black	4×
Technic Beam Triangle Thin [Type II]	99773	Yellow	20×

Build DNA

Parts inventory insights for Cat D11 Bulldozer

3,854 pieces puts this build +502% against the average Technic set and +624% against the average 2021 release.

LEGOTECHNIC

Vs average Technic set

+502%+3,214 parts

This set3,854

Average set640

Average Technic set: 640 pieces across 450 other sets.

Vs average 2021 set

+624%+3,322 parts

This set3,854

Average set532

Average 2021 set: 532 pieces across 471 other sets.

Color profile

15different colors

Dominant color

Black

Black2071x

54%

Yellow828x

21%

Light Bluish Gray418x

11%

Red276x

Unique parts

22 pieces per unique type

175

Repeat factor

Average pieces per unique type.

22x

Most used part

Technic Pin with Friction Ridges Lengthwise with No Center Slots

707x

Results are based on official LEGO part inventories. Accuracy improves as you confirm set completeness.

This site is not affiliated with or endorsed by the LEGO Group.

Build Insights🧩175unique parts🎨15different colors📊256.9avg. parts per color🏆707×Technic Pin with Friction Ridges Lengthwise with No Center Slots

🎨 All Technic sets 📅 All sets from 2021

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