How many pieces does the LEGO Mermaid Roller Coaster Ride (42703-1) have?

The LEGO Mermaid Roller Coaster Ride set (42703-1) contains 874 pieces. It was released in 2026 as part of the LEGO Friends theme.

How can I find missing parts for LEGO set 42703-1?

On BrickMissing you can check which parts from the LEGO Mermaid Roller Coaster Ride (42703-1) you already own. Add your LEGO collection and we'll show exactly which of the 874 pieces you're missing and which you already have.

Can I build the LEGO Mermaid Roller Coaster Ride 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 874 parts to show your buildability percentage and which specific pieces you still need.

What theme is the LEGO Mermaid Roller Coaster Ride from?

The LEGO Mermaid Roller Coaster Ride (42703-1) belongs to the LEGO Friends theme. You can browse all Friends sets on BrickMissing to find more sets from this theme.

Mermaid Roller Coaster Ride

42703-1 Friends 2026 874 parts 14.8% repair risk Advanced

The LEGO Friends Mermaid Roller Coaster Ride (42703-1) presents a vibrant aquatic amusement park experience for 2026. This 864-piece set features a fully functional roller coaster, meticulously designed to race its cars around a central, rotating pool where the elegant mermaids Serina and Azuria perform. Each mermaid mini-doll includes distinct translucent hair elements, enhancing their ethereal appearance during their synchronized water show. Among the five included mini-dolls is Autumn, whose unique facial element can be interchanged to display either a relaxed or an excited expression, perfectly capturing the thrill of the ride. The detailed theme park environment incorporates a charming ticket entrance, a comprehensive park map, and various photo opportunities, all constructed with specific curved track pieces and decorative details that define the ride’s winding path through the underwater world.

View at LEGO.com € 99,99→ lego.com

Parts Inventory

🧱 874 parts

Part	Color	Qty	LEGO price each
Plate 2 x 4 3020	Black	2×	€0,15 View at LEGO → View
MICROPHONE W/ Ø3.2 SHAFT 18740	Black	2×	Check price → View
MAILBOX, CASING 2X2X2 4345	Black	1×	Check price → View
Box 2 x 2 x 2 Door with Slot 4346	Black	1×	€0,16 View at LEGO → View
FOUR-SIDED SIGN WITH SNAP 65673	Black	1×	Check price → View
Grille Bar 1 x 4 x 1 2/3 Bull Bar, Squared 77083	Black	3×	€0,17 View at LEGO → View
Hair Long with Bun 2633	Black	1×	€0,90 View at LEGO → View
CAMERA 4724	Black	1×	Check price → View
Technic Axle 8 3707	Black	1×	€0,22 View at LEGO → View
Technic Pin with Friction Ridges Lengthwise with No Center Slots 61332	Black	9×	€0,06 View at LEGO → View
Plate 1 x 2 3023	Black	5×	€0,08 View at LEGO → View
Plate 2 x 8 3034	Tan	5×	€0,29 View at LEGO → View