Set Details
- Set Number
- 70171
- Name
- Ultrasonic Showdown
- Theme
- Agents
- Year
- 2015
- Pieces
- 187
- Complexity
- Moderate
- Build Time
- 1-2 hours
- Ages
- 8+
- Type
- Play-focused
About LEGO Ultrasonic Showdown
LEGO Ultrasonic Showdown (set #70171) is a mid-sized build with 187 pieces from the Agents theme, released in 2015. The Agents line features spy-themed vehicles and gadgets for secret missions. This is a moderate-level build suitable for ages 8+, with an estimated build time of 1-2 hours.
Set Highlights
- 187 pieces at moderate complexity — a 1-2 hours build.
- Compatible with all standard LEGO sets — bricks extend naturally into other sets you own.
- Play-focused build with interactive elements designed for 8+ builders.
Who Is This Set For?
Gift for Ages 8+
The moderate difficulty makes this accessible without being trivial — a well-matched gift for LEGO fans in the 8+ age range.
Weekend Build Project
187 pieces with an estimated 1-2 hours fits comfortably into a focused afternoon or weekend session.
Expanding a Agents Collection
A solid addition for collectors building out their Agents shelf. Introduces parts and builds that complement other sets from the same line.
Build Tips
Check the piece count on the bag against the parts list before starting — knowing what you have prevents mid-build surprises.
Even in small sets, connection order matters. Follow the steps rather than building sections independently.
For active play sets, key connection points (hinges, turntables, clip joints) can loosen over time — a small dab of LEGO's own tube clutch lubricant on the stud resolves most looseness without damage.
Finding Instructions
Building instructions for LEGO Ultrasonic Showdown (#70171) are available as a free PDF on LEGO.com. You can also upload a photo of this set to LegoFinder to identify it and access the instructions directly.
Ultrasonic Showdown FAQ
Related Reading
More Agents Sets
See all Agents →
Also Released in 2015
All 2015 sets →Similar Build Difficulty
Sets at roughly the same piece count and complexity tier — different theme and year, but a similar build experience.
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