How many pieces does the LEGO Droid Developer Kit (9748-1) have?

The LEGO Droid Developer Kit set (9748-1) contains 658 pieces. It was released in 1999 as part of the LEGO Mindstorms theme.

How can I find missing parts for LEGO set 9748-1?

On BrickMissing you can check which parts from the LEGO Droid Developer Kit (9748-1) you already own. Add your LEGO collection and we'll show exactly which of the 658 pieces you're missing and which you already have.

Can I build the LEGO Droid Developer Kit 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 658 parts to show your buildability percentage and which specific pieces you still need.

What theme is the LEGO Droid Developer Kit from?

The LEGO Droid Developer Kit (9748-1) belongs to the LEGO Mindstorms theme. You can browse all Mindstorms sets on BrickMissing to find more sets from this theme.

Droid Developer Kit

🏷️ 9748-1•🎨 Mindstorms•📅 1999•🧱 658 parts•Easy

Droid Developer Kit (9748-1) is a LEGO Mindstorms from 1999. This page uses the available set and theme data until a fuller product description is available.

Parts Inventory

🧱 658 parts

Part	Color	Qty
Tyre 30 x 10.5 Offset Tread 2346	Light Gray	4×
Tile Special 1 x 2 Grille with Bottom Groove 2412b	Light Gray	4×
Tile Special 1 x 2 Grille with Bottom Groove 2412b	White	2×
Plate 2 x 2 Corner 2420	Light Gray	4×
Plate 2 x 2 Corner 2420	White	4×
Plate Special 2 x 2 with 1 Pin Hole [Split Underside Ribs] 2444	Black	2×
Plate Round 2 x 2 with Rounded Bottom [Boat Stud] 2654	White	4×
Technic Axle Towball 2736	Light Gray	4×
Technic Slope Long 1 x 6 with 3 Pin Holes 2744	White	2×
Technic Pin with Friction Ridges Lengthwise and Center Slots 2780	Black	34×

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Plate Special 2 x 2 with 1 Pin Hole [Split Underside Ribs]	2444	Black	2×
Plate Round 2 x 2 with Rounded Bottom [Boat Stud]	2654	White	4×
Technic Axle Towball	2736	Light Gray	4×
Technic Slope Long 1 x 6 with 3 Pin Holes	2744	White	2×
Technic Pin with Friction Ridges Lengthwise and Center Slots	2780	Black	34×
Technic Beam 1 x 4 Thin with Stud Connector	2825	White	7×
Technic Beam 1 x 4 Thin with Stud Connector	2825	Light Gray	1×
Technic Beam Triangle Thin [Type I]	2905	White	2×
Plate 2 x 4	3020	White	2×
Plate 2 x 3	3021	White	4×
Plate 2 x 2	3022	Light Gray	6×
Plate 1 x 2	3023	Light Gray	7×
Plate 1 x 2	3023	White	4×
Plate 2 x 8	3034	White	2×
Slope 45° 2 x 4	3037	White	6×
Slope 45? 2 x 2	3039	White	4×
Slope 45° 2 x 1 with Bottom Pin	3040b	White	4×
Slope 45° 2 x 2 Double Convex	3045	White	4×
Tile 2 x 2 with Groove	3068b	White	2×
Technic Brick 1 x 2 [2 Pin Holes]	32000	White	4×
Technic Pin 3/4	32002	Dark Gray	16×
Technic Beam 1 x 11.5 Double Bent Thick	32009	White	3×
Technic Beam 1 x 11.5 Double Bent Thick	32009	Black	4×
Technic Axle and Pin Connector Angled #1	32013	White	6×
Technic Axle and Pin Connector Angled #1	32013	Black	4×
Technic Axle and Pin Connector Angled #6 - 90°	32014	White	4×
Technic Axle and Pin Connector Angled #5 - 112.5°	32015	White	4×
Technic Axle and Pin Connector Angled #3 - 157.5?	32016	White	2×
Technic Beam 1 x 5 Thin	32017	White	4×
Technic Beam 1 x 5 Thin	32017	Light Gray	5×
Plate Special 1 x 2 with Door Rail	32028	Light Gray	8×
Technic Axle and Pin Connector Angled #2 - 180°	32034	Black	3×
Technic Axle and Pin Connector Angled #2 - 180°	32034	White	4×
Technic Axle Connector with Axle Hole	32039	Black	6×
Technic Axle Connector with Axle Hole	32039	Light Gray	8×
Technic Pin Long with Friction Ridges Lengthwise and Stop Bush [3 Lateral Holes, Big Pin Hole]	32054	Red	8×
Technic Pin Long with Friction Ridges Lengthwise and Stop Bush [3 Lateral Holes, Big Pin Hole]	32054	Black	8×
Technic Beam 3 x 3 L-Shape Thin	32056	White	4×
Technic Axle 2 Notched	32062	Black	19×
Technic Beam 1 x 6 Thin	32063	Light Gray	8×
Technic Brick 1 x 2 with Axle Hole Type 1 [+ Opening] and Bottom Ridges	32064c	Tan	2×
Technic Brick 1 x 2 with Axle Hole Type 1 [+ Opening] and Bottom Ridges	32064c	Tan	1×
Technic Beam 1 x 7 Thin	32065	Light Gray	2×
Technic Axle and Pin Connector Perpendicular 3L with Pin Hole	32068	Light Gray	2×
Technic Steering Arm with 2 Pins	32069	Black	2×
Technic Axle 5	32073	Black	5×
Technic Bush 1/2 Smooth with Axle Hole Reduced	32123a	Tan	21×
Technic Axle and Pin Connector Toggle Joint Smooth	32126	Light Gray	5×
Technic Pin Double with Axle Hole	32138	White	4×
Technic Beam 2 x 4 L-Shape Thick	32140	Light Gray	5×
Technic Gearbox Half	32166	White	2×
Large Figure Skeletal, Limb, Angular, 2 x 7 with 2 Ball Joints	32173	White	2×
Technic Axle Connector 2 x 3 with Ball Socket, Open Sides	32174	White	4×
Technic Connector Block 3 x 3 Triangular with Axle, and Pin Hole	32175	White	2×
Technic Beam 1 x 7 with Fan	32177	Black	2×
Technic Beam 1 x 7 with Fan	32177	White	2×
Technic Panel Fairing # 3 Large Long, Large Holes, Side A	32188	White	2×
Technic Panel Fairing # 4 Large Long, Large Holes, Side B	32189	White	2×
Axle Hose, Soft 11L	32199	White	4×
Axle Hose, Soft 11L	32199	Dark Gray	4×
Axle Hose, Soft 12L	32200	Light Gray	1×
Axle Hose, Soft 19L	32235	Light Gray	1×
Technic Gear 20 Tooth Double Bevel with Axle Hole Type 2 [X Opening]	32269	Light Gray	3×
Technic Gear 12 Tooth Double Bevel	32270	Light Gray	2×
Technic Beam 1 x 9 Bent (7 - 3) Thick	32271	Light Gray	2×
Technic Beam 1 x 9 Bent (7 - 3) Thick	32271	White	7×
Technic Turntable 4 x 6 Complete Assembly (Mindstorms)	32273c01	Black	1×
Hub, Micro Scout with Blue Buttons and Dark Gray Base	32344c01	White	1×
Wheel with Split Axle hole	3482	Light Gray	4×
Plate 1 x 3	3623	Light Gray	2×
Technic Gear 8 Tooth	3647	Light Gray	1×
Technic Gear 24 Tooth [New Style with Single Axle Hole]	3648b	Light Gray	3×
Technic Brick 1 x 2 [1 Pin Hole]	3700	White	5×
Technic Brick 1 x 4 [3 Pin Holes]	3701	White	12×
Technic Brick 1 x 8 [7 Pin Holes]	3702	White	2×
Technic Brick 1 x 16 [15 Pin Holes]	3703	White	4×
Technic Axle 4	3705	Black	12×
Technic Axle 6	3706	Black	9×
Technic Axle 8	3707	Black	3×
Technic Axle 12	3708	Black	1×
Plate 1 x 4	3710	White	6×
Plate 1 x 4	3710	Light Gray	2×
Technic Bush	3713	Light Gray	17×
Technic Axle 10	3737	Black	2×
Technic Axle Pin without Friction Ridges Lengthwise	3749	Light Gray	33×
Plate Special 1 x 2 with 1 Stud without Groove (Jumper)	3794a	Light Gray	2×
Plate 2 x 10	3832	Light Gray	2×
Technic Brick 1 x 6 [5 Pin Holes]	3894	White	8×
Technic Gear 16 Tooth with Round Holes [Old Style]	4019	Light Gray	4×
CD-Rom, for 9748	4128535	Unknown	1×
Technic Wedge Belt Wheel [aka Pulley]	4185	Light Gray	4×
Technic Pin 1/2	4274	Light Gray	12×
Slope Inverted 34° 3 x 1 without Internal Stopper	4287a	Tan	2×
Plate 1 x 10	4477	White	4×
Technic Axle 3	4519	Black	19×
Technic Worm Gear	4716	Light Gray	1×
Dish 2 x 2 Inverted [Radar]	4740	White	2×
Technic Panel Dome 6 x 6 x 5 2/3 with R2-D2 No Eye Print	51pr0001	Metallic Silver	1×
Technic Panel Dome 6 x 6 x 5 2/3 with R2-D2 Eye Print	51pr0002	Metallic Silver	1×
Plate Round 1 x 1 with Solid Stud	6141	Trans-Red	2×
Plate Round 1 x 1 with Solid Stud	6141	Light Gray	18×
Technic Axle and Pin Connector Perpendicular	6536	Light Gray	11×
Technic Axle and Pin Connector Perpendicular	6536	White	14×
Technic Axle and Pin Connector Perpendicular	6536	Black	2×
Technic Axle Connector Ridged [with x Hole x Orientation]	6538b	Black	4×
Technic Axle Connector Ridged [with x Hole x Orientation]	6538b	White	10×
Technic Brick 1 x 1 with Pin Hole	6541	Light Gray	6×
Technic Pin Long with Friction Ridges Lengthwise, 2 Center Slots	6558	Black	20×
Technic Axle 3 with Stud	6587	Dark Gray	3×
Technic Gear 12 Tooth Bevel	6589	Light Gray	6×
Technic Beam 1 x 3 Thin	6632	White	12×
Technic Beam 1 x 3 Thin	6632	Light Gray	2×
Tile 1 x 6 with Groove	6636	White	4×
Technic Flex Cable End - Ball Connection with Cage	6644	Black	4×
Rubber Band Small 13mm (Square Cross Section)	71509	Black	2×
Technic Pin Connector Round [No Slot]	75535	White	2×
Hose Rigid 3mm D. 3L / 2.4cm	75c03	Dark Gray	2×
Hose, Ribbed 7mm D. 4L / 3.2cm	78c04	Light Gray	2×
Hose, Ribbed 7mm D. 8L / 6.4cm	78c08	White	1×
Hose, Ribbed 7mm D. 8L / 6.4cm	78c08	Black	2×
Technic Rubber Belt Medium [26mm ID] [Round Cross Section]	85545	Black	2×
Technic Flex Cable 5L	flex08c05	Light Gray	2×

Build DNA

Parts inventory insights for Droid Developer Kit

658 pieces puts this build +42% against the average Mindstorms set and +250% against the average 1999 release.

LEGOMINDSTORMS

Vs average Mindstorms set

+42%+195 parts

This set658

Average set463

Average Mindstorms set: 463 pieces across 33 other sets.

Vs average 1999 set

+250%+470 parts

This set658

Average set188

Average 1999 set: 188 pieces across 144 other sets.

Color profile

9different colors

Dominant color

Light Gray

Light Gray216x

33%

White206x

31%

Black172x

26%

Tan26x

Unique parts

6.2 pieces per unique type

106

Repeat factor

Average pieces per unique type.

Most used part

Technic Pin with Friction Ridges Lengthwise and Center Slots

34x

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🧩106unique parts🎨9different colors📊73.1avg. parts per color🏆34×Technic Pin with Friction Ridges Lengthwise and Center Slots

🎨 All Mindstorms sets 📅 All sets from 1999

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