LEGO Hydroplane Racer 42045
Compare 0 retailers.
Retailer prices for 42045 are sorted by the latest lowest price.
Retailer pricesPrice history 42045
Full price history at a glance.
We check Dutch retailers every day. This graph shows the full daily-low price series we have for this set.
Daily lowest price tracked across 1 Dutch retailers. The dotted line marks LEGO's recommended retail price.
Source: daily measurement at 1 Dutch retailers, 27 Dec 2025 – 29 Jan 2026. RRP via LEGO.com.
| Date | Price | Retailer | Stock |
|---|---|---|---|
| €54,99 | Bol.com | In stock | |
| €54,99 | Bol.com | In stock | |
| €54,99 | Bol.com | In stock | |
| €54,99 | Bol.com | In stock | |
| €54,99 | Bol.com | In stock | |
| €54,99 | Bol.com | In stock | |
| €54,99 | Bol.com | In stock | |
| €54,99 | Bol.com | In stock | |
| €54,99 | Bol.com | In stock | |
| €54,99 | Bol.com | In stock | |
| €54,99 | Bol.com | In stock | |
| €54,99 | Bol.com | In stock |
Price will likely move slightly.
Calibrated forecast based on historical pricing, seasonal patterns and retailer behavior. Tuned conservatively: rather cautious than optimistic.
Signal is mixed. Small movements are more likely than a big drop.
Projected price path
About this set
What to know about LEGO 42045 before you buy.
Thunder over the ocean with the Hydroplane Racer! Smash water speed records with this amazing, aerodynamic 2-in-1 model, featuring massive sponsons, large cockpit and a blue and white color scheme with sporty black-and-white checkered racing stickers. Maneuver this powerful machine to the starting line and see the propeller and engine pistons spring into action. Now get ready to race! When you feel like another building challenge, rebuild it into a high-speed Race Boat. Interactive, 3D Digital LEGO® Building Instructions app available online, for both models! * Features a unique aerodynamic design with huge sponsons, large cockpit, detailed engine with moving pistons and a spinning propeller. * Check out the blue and white color scheme with sporty black-and-white checkered racing stickers. * Maneuver the Hydroplane Racer and see the engine and propeller spring to life. * This LEGO Technic model is designed to provide an immersive and rewarding building experience. * Appropriate for children aged 8 to 14. * Interactive, 3D Digital LEGO Building Instructions app available online for both A and B models. * 2-in-1 model: rebuilds into a Race Boat. * Hydroplane Racer measures over 2” (6cm) high, 9” (23cm) long and 5” (13cm) wide. * Race Boat measures over 2” (6cm) high, 8” (21cm) long and 3” (10cm) wide.
All about this set
Background, build experience, collector context, and buying notes in one story.
Thunder over the ocean with the Hydroplane Racer! Smash water speed records with this amazing, aerodynamic 2-in-1 model, featuring massive sponsons, large cockpit and a blue and white color scheme with sporty black-and-white checkered racing stickers. Maneuver this powerful machine to the starting line and see the propeller and engine pistons spring into action. Now get ready to race! When you feel like another building challenge, rebuild it into a high-speed Race Boat. Interactive, 3D Digital LEGO® Building Instructions app available online, for both models! * Features a unique aerodynamic design with huge sponsons, large cockpit, detailed engine with moving pistons and a spinning propeller. * Check out the blue and white color scheme with sporty black-and-white checkered racing stickers. * Maneuver the Hydroplane Racer and see the engine and propeller spring to life. * This LEGO Technic model is designed to provide an immersive and rewarding building experience. * Appropriate for children aged 8 to 14. * Interactive, 3D Digital LEGO Building Instructions app available online for both A and B models. * 2-in-1 model: rebuilds into a Race Boat. * Hydroplane Racer measures over 2” (6cm) high, 9” (23cm) long and 5” (13cm) wide. * Race Boat measures over 2” (6cm) high, 8” (21cm) long and 3” (10cm) wide.
When current prices are available, buying context appears here.
Instructions & specifications
Dimensions, pieces, build steps, and the official PDF building instruction.
Parts inventory
Known set data around pieces and build context.
Technic Pins
Technic Pin with Friction Ridges Lengthwise and Center Slots
Part ID 2780 · Black
Qty 30
Technic Pin Long with Friction Ridges Lengthwise, 2 Center Slots
Part ID 6558 · Blue
Qty 8
Technic Axle Pin with Friction Ridges Lengthwise
Part ID 43093 · Blue
Qty 5
Technic Pin Long with Friction Ridges Lengthwise and Stop Bush [3 Lateral Holes, Big Pin Hole]
Part ID 32054 · Light Bluish Gray
Qty 4
Technic Axle Pin without Friction Ridges Lengthwise
Part ID 3749 · Tan
Qty 2
Technic Axle Pin 3L with Friction Ridges Lengthwise and 2L Axle
Part ID 18651 · Black
Qty 1
Technic Pin 3/4
Part ID 32002 · Tan
Qty 1
Technic Pin with Friction Ridges Lengthwise and Center Slots
Part ID 2780 · Black · Spare
Qty 1
Technic Pin 3/4
Part ID 32002 · Tan · Spare
Qty 1
Technic Connectors
Technic Axle and Pin Connector Perpendicular
Part ID 6536 · White
Qty 8
Technic Axle and Pin Connector Perpendicular 3L with Centre Pin Hole
Part ID 32184 · Light Bluish Gray
Qty 6
Technic Axle Connector with Axle Hole
Part ID 32039 · Black
Qty 4
Technic Axle and Pin Connector, Perpendicular with Extension
Part ID 53586 · Flat Silver
Qty 4
Technic Axle and Pin Connector Angled #1
Part ID 32013 · White
Qty 2
Technic Pin Connector Round [Slotted]
Part ID 62462 · Light Bluish Gray
Qty 1
Technic Axle and Pin Connector Perpendicular Triple
Part ID 63869 · Light Bluish Gray
Qty 1
Technic Axles
Technic Axle 2 Notched
Part ID 32062 · Red
Qty 7
Technic Axle 3
Part ID 4519 · Light Bluish Gray
Qty 6
Technic Axle 5
Part ID 32073 · Light Bluish Gray
Qty 4
Technic Axle 4
Part ID 3705 · Black
Qty 2
Technic Axle 5 with Stop
Part ID 15462 · Dark Tan
Qty 1
Technic Axle 7
Part ID 44294 · Yellow
Qty 1
Technic Axle 9
Part ID 60485 · Light Bluish Gray
Qty 1
Technic Axle 4 with Stop
Part ID 87083 · Dark Bluish Gray
Qty 1
Technic Bushes
Technic Bush 1/2 Smooth with Axle Hole Semi-Reduced
Part ID 32123b · Yellow
Qty 6
Technic Bush
Part ID 3713 · Light Bluish Gray
Qty 1
Technic Bush 1/2 Smooth with Axle Hole Semi-Reduced
Part ID 32123b · Yellow · Spare
Qty 1
Technic Bush
Part ID 3713 · Light Bluish Gray · Spare
Qty 1
Technic Steering, Suspension and Engine
Technic Engine Cylinder without Side Slots, with Bottom Slots
Part ID 2850b · Light Bluish Gray
Qty 4
Technic Engine Piston Round
Part ID 2851 · Yellow
Qty 4
Technic Engine Connecting Rod
Part ID 2852 · Light Bluish Gray
Qty 4
Technic Engine Crankshaft Center
Part ID 2854 · Tan
Qty 3
Technic Engine Crankshaft
Part ID 2853 · Yellow
Qty 2
Technic Beams
Technic Beam 3 x 3 L-Shape Thin
Part ID 32056 · Black
Qty 4
Technic Beam 1 x 3 Thick
Part ID 32523 · White
Qty 4
Technic Beam 2 x 4 L-Shape Thick
Part ID 32140 · White
Qty 3
Technic Beam 1 x 2 Thick with Pin Hole and Axle Hole
Part ID 60483 · Dark Bluish Gray
Qty 3
Technic Beam 2 x 4 L-Shape Thick
Part ID 32140 · Blue
Qty 2
Technic Beam 1 x 4 Thin
Part ID 32449 · Black
Qty 2
Technic Beam 1 x 7 Thick
Part ID 32524 · Blue
Qty 2
Technic Beam 1 x 11 Thick
Part ID 32525 · White
Qty 2
Technic Beam 1 x 13 Thick
Part ID 41239 · Black
Qty 2
Technic Beam 1 x 3 Thin
Part ID 6632 · White
Qty 2
Technic Beams Special
Technic Beam 3 x 0.5 Liftarm with Boss and Pin / Crank
Part ID 33299a · Light Bluish Gray
Qty 4
Technic Panels
Technic Panel Curved and Bent 6 x 3
Part ID 24116 · Blue
Qty 2
Technic Panel Curved 3 x 13
Part ID 18944 · Blue
Qty 1
Technic Panel Fairing # 4 Small Smooth Long, Side B
Part ID 64391 · White
Qty 1
Technic Panel Fairing #17 Large Smooth, Side A
Part ID 64392 · White
Qty 1
Technic Panel Fairing #6 Long Smooth, Side B
Part ID 64393 · White
Qty 1
Technic Panel Fairing #5 Long Smooth, Side A
Part ID 64681 · White
Qty 1
Technic Panel Fairing #18 Large Smooth, Side B
Part ID 64682 · White
Qty 1
Technic Panel Fairing # 3 Small Smooth Long, Side A
Part ID 64683 · White
Qty 1
Plates Round Curved and Dishes
Plate Round 2 x 2 with Rounded Bottom [Boat Stud]
Part ID 2654 · Blue
Qty 2
Wheels and Tyres
Technic Wedge Belt Wheel Tire
Part ID 2815 · Black
Qty 2
Technic Wedge Belt Wheel [aka Pulley]
Part ID 4185 · Light Bluish Gray
Qty 2
Wheel 31 x 15 Technic, 7 Pin Holes
Part ID 60208 · White
Qty 1
Technic Bricks
Technic Brick 1 x 2 [2 Pin Holes]
Part ID 32000 · Black
Qty 2
Tubes and Hoses
Axle Hose, Soft 7L
Part ID 32580 · Black
Qty 2
Technic Gears
Technic Gear 8 Tooth [Reinforced]
Part ID 10928 · Dark Bluish Gray
Qty 1
Technic Gear 20 Tooth Bevel
Part ID 32198 · Tan
Qty 1
Technic Gear 12 Tooth Double Bevel
Part ID 32270 · Black
Qty 1
Technic Gear 24 Tooth [New Style with Single Axle Hole]
Part ID 3648b · Dark Bluish Gray
Qty 1
Stickers
Sticker Sheet for Set 42045-1
Part ID 24732 · [No Color/Any Color]
Qty 1
Transportation - Sea and Air
Propeller 3 Blade 3 Diameter with Axle Cross
Part ID 6041 · Black
Qty 1
Retailer reviews
Summarized retailer review data when available.
All retailer prices
Current prices, stock and discounts per retailer.
Price context
Lowest, highest and average price for this set.
This context is based on 24 price points across 0 retailers. The chart on the page remains the full interactive source.
Price forecast
Conservative baseline for the next period.
The signal is mixed. Small movements are more likely than a large drop.
FAQ & set details
Pieces, year, RRP and retailer coverage.
What is the lowest price for Hydroplane Racer?
Has LEGO 42045 ever been cheaper?
How many pieces does LEGO 42045 have?
What year is this set from?
What is the RRP for LEGO 42045?
What is the recommended age for LEGO 42045?
Is LEGO 42045 still available?
Which retailers do you compare?
How often do you update prices?
Frequently asked questions
Quick answers about price, stock and set data.