Take Control!
The Top Gear Rally Car is here!

Build, race, and conquer with this 463-piece LEGO Technic set. App-controlled action puts you in the driver's seat!

🏛 Technic
Set #42109

App-Controlled Top Gear Rally Car

The App-Controlled Top Gear Rally Car is a unique blend of LEGO Technic and app-controlled functionality.

Before you buy

Who it's for
Ages 9+ · Intermediate build Perfect for teens and adults who enjoy remote-controlled vehicles and Technic building.
Build
463 pieces · about 4.5 hours Build time is an estimate.
Price
$129.99 list price · 28.1¢ per piece
Availability
Retired at LEGO
★★★☆☆ 3.5 community rating from 96 ratings

Fans appreciate the app-controlled functionality and the engaging building experience, but some find the car's design less appealing than other Technic sets and the reliance on the app a potential drawback.

📝 Our Take

AI-assisted editorial summary, grounded in our LEGO database and public community discussions. How we use AI

The App-Controlled Top Gear Rally Car is a unique blend of LEGO Technic and app-controlled functionality. This set offers a fun building experience combined with the excitement of driving your own rally car using a smart device. It’s a great way to introduce younger builders to the world of Technic and robotics.

This set is perfect for LEGO enthusiasts who enjoy remote-controlled vehicles and Technic building. The build is engaging, and the app control adds a layer of interactivity that enhances the play experience. It's also a great gift for kids and adults who love cars and technology.

Skip this if you're primarily looking for a display model or a more complex Technic build. While fun to play with, it lacks the intricate detail of some larger Technic sets. Consider the LEGO Technic Bugatti Chiron 42083-1 for a more advanced building and display experience.

✨ New
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Try asking:
How does the app control compare to other LEGO remote-controlled vehicles? What are some creative ways to customize the rally car's performance and appearance? Is this set a good value compared to other Technic sets with similar piece counts? How well does this set hold up to regular play and outdoor use?

🧱 Building Experience

AI-assisted build estimate, grounded in our LEGO database and public community discussions. How we use AI
🧩
463
Pieces
⏱
4.5h
Estimated Build Time
📊
Intermediate
Difficulty
📏
26cm × 10cm × 14cm
Dimensions
Build Highlights:
  • Building the chassis and drivetrain
  • Integrating the Powered Up components
  • Learning about gear ratios and mechanics
  • Testing the app-controlled functions

📈 Investment Analysis

AI-assisted investment analysis, grounded in our LEGO database and public community discussions. How we use AI
→ Price stable
B-
Investment Grade
⏳ Retired
The App-Controlled Top Gear Rally Car (42109-1) presents a mixed investment profile. As a retired set, its value may gradually increase, especially if the Powered Up system becomes more collectible. However, its initial high MSRP and the reliance on app functionality might limit its long-term appreciation. Theme popularity and piece count are moderate, suggesting a steady but not explosive growth potential. Investors should monitor demand for similar Technic sets and the availability of replacement Powered Up components.

Not Financial Advice: Content is for educational purposes only. Past performance doesn't guarantee future results. Full disclaimer

⚖ Compare Similar Sets

Compared to other Technic sets in its price range, the App-Controlled Top Gear Rally Car stands out due to its interactive app control. However, it might lack the complexity and display appeal of sets like the LEGO Technic Porsche 911 RSR 42096-1. Someone might choose this set for the fun of driving it around, while others might prefer a more intricate building experience with a static display model.

📦 Parts Inventory

Official piece count
463
Parts cataloged in this inventory
88 unique parts, 463 pieces
Technic Axle Pin 3L with Friction Ridges Lengthwise and 1L Axle Technic Axle Pin ...
Part #: 11214 15× Red
Brick Curved 2 x 1 No Studs [1/2 Bow] Brick Curved 2 x ...
Part #: 11477 2× White
Technic Panel Fairing #21 5L Small Smooth, Side B Technic Panel Fai...
Part #: 11946 3× Dark Blue
Technic Panel Fairing #22 5L Small Smooth, Side A Technic Panel Fai...
Part #: 11947 3× Dark Blue
Technic Panel Curved 11 x 3 with 10 Pin Holes through Panel Surface Technic Panel Cur...
Part #: 11954 4× Black
Wheel 18 x 8 with Fake Bolts and Deep Spokes with Inner Ring Wheel 18 x 8 with...
Part #: 13971 1× Light Bluish Gray
Tile Round 2 x 2 with Bottom Stud Holder Tile Round 2 x 2 ...
Part #: 14769 4× White
Tyre 49.53 x 20 Tyre 49.53 x 20
Part #: 15413 2× Black
Technic Panel 3 x 11 x 1 Technic Panel 3 x...
Part #: 15458 2× White
Technic Axle Pin 3L with Friction Ridges Lengthwise and 2L Axle Technic Axle Pin ...
Part #: 18651 4× Black
Technic Pin Connector Round 1L [Beam] Technic Pin Conne...
Part #: 18654 7× Black
Technic Pin Connector Round 1L [Beam] Technic Pin Conne...
Part #: 18654 2× Light Bluish Gray
Plate Special 1 x 2 with Pin Hole Underneath Plate Special 1 x...
Part #: 18677 2× Black
Technic Panel Curved 3 x 13 Technic Panel Cur...
Part #: 18944 1× Black
Hub, Powered Up 4-Port (Technic Control+) - Clip Opening Hub, Powered Up 4...
Part #: 22127 1× Light Bluish Gray
Motor, Large, Powered Up Motor, Large, Pow...
Part #: 22169 1× Dark Bluish Gray
Motor, XL, Powered Up Motor, XL, Powere...
Part #: 22172 1× Dark Bluish Gray
Technic Pin Connector Hub with 1 Axle Technic Pin Conne...
Part #: 22961 2× Red
Technic Panel Curved and Bent 6 x 3 Technic Panel Cur...
Part #: 24116 2× Red
Technic Panel Curved 7 x 3 with 2 Pin Holes through Panel Surface Technic Panel Cur...
Part #: 24119 1× White
Brick Round 1 x 1 diameter Tube with 90 Degree Elbow (2 x 2 x 1) and Axle Holes (Crossholes) at each end Brick Round 1 x 1...
Part #: 25214 1× Yellow
Brick Round 1 x 1 diameter Tube with 90 Degree Elbow (2 x 2 x 1) and Axle Holes (Crossholes) at each end Brick Round 1 x 1...
Part #: 25214 4× Black
Brick Round 1 x 1 diameter Tube with 90 Degree Elbow (2 x 2 x 1) and Axle Holes (Crossholes) at each end Brick Round 1 x 1...
Part #: 25214 6× Light Bluish Gray
Technic Pin with Friction Ridges Lengthwise and Center Slots Technic Pin with ...
Part #: 2780 95× Black
Technic Pin Connector Hub with 2 Axles Technic Pin Conne...
Part #: 27940 2× Dark Bluish Gray
Plate 1 x 1 Plate 1 x 1
Part #: 3024 2× White
Brick Curved 2 x 2 with Lip, No Studs Brick Curved 2 x ...
Part #: 30602 2× Trans-Clear
Technic Brick 1 x 2 [2 Pin Holes] Technic Brick 1 x...
Part #: 32000 2× Red
Technic Pin 3/4 Technic Pin 3/4
Part #: 32002 4× Tan
Technic Beam 1 x 11.5 Double Bent Thick Technic Beam 1 x ...
Part #: 32009 6× Black
Technic Axle and Pin Connector Angled #1 Technic Axle and ...
Part #: 32013 6× Black
Technic Beam 1 x 5 Thin Technic Beam 1 x ...
Part #: 32017 2× Light Bluish Gray
Technic Axle and Pin Connector Angled #2 - 180° Technic Axle and ...
Part #: 32034 1× Light Bluish Gray
Technic Axle Connector with Axle Hole Technic Axle Conn...
Part #: 32039 1× Yellow
Technic Pin Long with Friction Ridges Lengthwise and Stop Bush [3 Lateral Holes, Big Pin Hole] Technic Pin Long ...
Part #: 32054 10× Red
Technic Axle 2 Notched Technic Axle 2 No...
Part #: 32062 11× Red
Technic Bush 1/2 Smooth with Axle Hole Semi-Reduced Technic Bush 1/2 ...
Part #: 32123b 2× Yellow
Technic Beam 2 x 4 L-Shape Thick Technic Beam 2 x ...
Part #: 32140 6× Black
Technic Axle and Pin Connector Perpendicular 3L with Centre Pin Hole Technic Axle and ...
Part #: 32184 2× Red
Technic Gear 12 Tooth Double Bevel Technic Gear 12 T...
Part #: 32270 1× Black
Technic Axle and Pin Connector Perpendicular Double Technic Axle and ...
Part #: 32291 2× Black
Technic Beam 1 x 5 Thick Technic Beam 1 x ...
Part #: 32316 2× Red
Technic Gear 36 Tooth Double Bevel Technic Gear 36 T...
Part #: 32498 1× Black
Technic Beam 1 x 3 Thick Technic Beam 1 x ...
Part #: 32523 1× Light Bluish Gray
Technic Beam 1 x 7 Thick Technic Beam 1 x ...
Part #: 32524 1× Black
Technic Beam 1 x 11 Thick Technic Beam 1 x ...
Part #: 32525 5× Dark Blue
Technic Beam 3 x 5 L-Shape Thick Technic Beam 3 x ...
Part #: 32526 14× Black
Technic Pin without Friction Ridges Lengthwise Technic Pin witho...
Part #: 3673 2× Light Bluish Gray
Technic Axle 4 Technic Axle 4
Part #: 3705 3× Black
Technic Axle 8 Technic Axle 8
Part #: 3707 1× Black
Technic Bush Technic Bush
Part #: 3713 3× Red
Technic Beam Frame 7 x 11 Technic Beam Fram...
Part #: 39794 2× White
Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening) Plate Round 2 x 2...
Part #: 4032a 10× Black
Technic Beam 1 x 9 Thick Technic Beam 1 x ...
Part #: 40490 5× White
Technic Beam 1 x 13 Thick Technic Beam 1 x ...
Part #: 41239 1× Black
Technic Beam 1 x 2 Thin Technic Beam 1 x ...
Part #: 41677 10× Red
Brick Wedged, Curved 6 x 2 Right, Inner Ridges Brick Wedged, Cur...
Part #: 41747 1× White
Brick Wedged, Curved 6 x 2 Left, Inner Ridges Brick Wedged, Cur...
Part #: 41748 1× White
Technic Axle and Pin Connector Perpendicular 3L with 2 Pin Holes Technic Axle and ...
Part #: 42003 4× Black
Technic Panel Car Mudguard Arched 9 x 2 x 3 #30 Technic Panel Car...
Part #: 42531 1× Red
Technic Panel Car Mudguard Arched 9 x 2 x 3 #30 Technic Panel Car...
Part #: 42531 5× White
Technic Pin 1/2 without Friction Ridges Technic Pin 1/2 w...
Part #: 4274 10× Blue
Technic Axle Pin with Friction Ridges Lengthwise Technic Axle Pin ...
Part #: 43093 32× Blue
Technic Axle 7 Technic Axle 7
Part #: 44294 1× Yellow
Tyre 43.2 x 22 ZR Tyre 43.2 x 22 ZR
Part #: 44309 2× Black
Technic Axle 3 Technic Axle 3
Part #: 4519 3× Yellow
Wire Clip with Axle Hole Wire Clip with Ax...
Part #: 49283 2× Yellow
Wire Clip with Axle Hole Wire Clip with Ax...
Part #: 49283 2× Red
Wheel 30.4 x 20 without Pinholes, with Reinforced Rim Wheel 30.4 x 20 w...
Part #: 56145 4× Black
Technic Axle 5.5 with Stop [Rounded Short End] Technic Axle 5.5 ...
Part #: 59426 1× Dark Bluish Gray
Technic Beam 1 x 2 Thick with Pin Hole and Axle Hole Technic Beam 1 x ...
Part #: 60483 7× Dark Bluish Gray
Technic Beam 3 x 3 T-Shape Thick Technic Beam 3 x ...
Part #: 60484 7× Light Bluish Gray
Technic Beam 3 x 0.5 Liftarm with Boss and Blocked, Squared Pin Hole Technic Beam 3 x ...
Part #: 61408 4× Black
Technic Pin Connector Round [Slotted] Technic Pin Conne...
Part #: 62462 2× Black
Technic Axle and Pin Connector Perpendicular Triple Technic Axle and ...
Part #: 63869 6× Black
Technic Beam Frame 5 x 7 with 3 x 5 Opening Thick Technic Beam Fram...
Part #: 64179 1× Light Bluish Gray
Technic Panel Fairing # 4 Small Smooth Long, Side B Technic Panel Fai...
Part #: 64391 2× Black
Technic Panel Fairing # 3 Small Smooth Long, Side A Technic Panel Fai...
Part #: 64683 2× Black
Technic Panel 5 x 11 x 1 Technic Panel 5 x...
Part #: 64782 1× White
Technic Axle and Pin Connector Perpendicular Technic Axle and ...
Part #: 6536 6× Light Bluish Gray
Differential Gear - 28 Tooth with Round Axle Hole Differential Gear...
Part #: 65413 1× Red
Differential Gear House Differential Gear...
Part #: 65414 1× Light Bluish Gray
Technic Pin Connector Hub with 1 Pin with Friction Ridges Lengthwise [Centered Friction Ridge] Technic Pin Conne...
Part #: 65487 8× Light Bluish Gray
Technic Pin Connector Hub with 1 Pin with Friction Ridges Lengthwise [Centered Friction Ridge] Technic Pin Conne...
Part #: 65487 1× Yellow
Technic Pin Connector Hub with 1 Pin with Friction Ridges Lengthwise [Centered Friction Ridge] Technic Pin Conne...
Part #: 65487 1× Black
Technic Pin Connector Hub Perpendicular 3L with 4 Pins (Squared Holes) Technic Pin Conne...
Part #: 65489 2× Light Bluish Gray
Technic Pin Long with Friction Ridges Lengthwise, 2 Center Slots Technic Pin Long ...
Part #: 6558 34× Blue
Sticker Sheet for Set 42109-1 Sticker Sheet for...
Part #: 65626 1× [No Color/Any Color]
Technic Gear 12 Tooth Bevel Technic Gear 12 T...
Part #: 6589 5× Tan
Technic Pin with Friction Ridges Lengthwise and Towball - Round Pin Hole Technic Pin with ...
Part #: 66906 2× Red
Technic Panel Fairing #1 Small Smooth Short, Side A Technic Panel Fai...
Part #: 87080 1× Black
Technic Axle 4 with Stop Technic Axle 4 wi...
Part #: 87083 4× Dark Bluish Gray
Technic Panel Fairing #2 Small Smooth Short, Side B Technic Panel Fai...
Part #: 87086 1× Black
Technic Gear Rack 1 x 7 with Axle and Pin Holes Technic Gear Rack...
Part #: 87761 1× Black
Tile Round 1 x 1 Tile Round 1 x 1
Part #: 98138 4× Trans-Red
This set offers a good selection of Technic pins and beams, useful for MOC builders looking to add structural elements and functionality to their creations. The variety of colors, especially the blue and red pins, can be integrated into various projects.

🛒 Where to Buy

BrickLink
✓ In Stock
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$20.00
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💎 Notable Parts

Black Technic Pin with Friction Ridges Lengthwise and Center Slots (95x) $4.75
Blue Technic Pin Long with Friction Ridges Lengthwise, 2 Center Slots (34x) $1.70
Red Technic Axle Pin 3L with Friction Ridges Lengthwise and 1L Axle (15x) $0.75
Black Technic Beam 3 x 5 L-Shape Thick (14x) $2.10
Dark Blue Technic Beam 1 x 11 Thick (5x) $0.75
Est. BrickLink Part Value
$10.05

💡 MOC Potential

🚗 Off-road buggy with enhanced suspension
🤖 Small, tracked exploration robot
🚗 Modified rally car with custom bodywork

Community Insights

Real opinions from Reddit and YouTube

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📖 Building Instructions 2

App-Controlled Top Gear Rally Car Instructions
BI 3104, 116+4/65+200G, 42109 V29
Download PDF
App-Controlled Top Gear Rally Car Instructions
BI 3104, 116+4/65+200G, 42109 V39
Download PDF

Charts Inventory Statistics

88
Unique Parts
463
Official Piece Count
463
Cataloged Inventory Pieces
0
Minifigures
11
Spare Parts
Inventory Version: 2

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