Buyer Research

2021 Ski-Doo Renegade X-RS 900 ACE Turbo — Should You Buy One?

Typical asking price: $10,000–$15,000. There is 1 high-severity known issue you need to know before handing over a check.

Kestrel Take

The X-RS is Ski-Doo's crossover icon — 900 ACE Turbo in a trail chassis gives you power without the 2-stroke vibration and premix anxiety. The intercooler ice issue sounds alarming but is manageable. This is the sled for riders who want refinement and performance without going full mountain or full touring.

Known Issues for the 2021 Ski-Doo Renegade X-RS 900 ACE Turbo

Ranked by wallet impact. These are documented, recurring problems — not freak accidents.

ACE 900 Turbo intercooler ice blockageHigh — wallet impact

The intercooler on the 900 ACE Turbo can ice up in specific temperature and humidity conditions, causing sudden boost loss and power cut. Affects riders in wet-snow conditions between -5°C and +2°C.

Repair cost range: $200–$500 for a heated intake solution; free to clear manually

rMotion shock wear at high milesMedium

The rMotion rear suspension's piggyback shocks lose nitrogen charge and damping over time. Over 3,000 miles without a rebuild and the suspension feels vague on rough trails.

Repair cost range: $400–$800 shock rebuild

Walk-Away Red Flags

✗Intercooler issue not addressed — ask specifically if the owner has experienced the power cut
✗Trail miles over 4,000 with no shock rebuild
✗Boost gauge absent or modified — suggests someone is chasing more power than the engine is designed for

Good Signs

✓BRP software updated (the intercooler issue has a partial mitigation in firmware)
✓Low miles, primarily groomed trail use where the icing condition is less likely
✓rMotion shocks recently rebuilt or replaced

Found a specific Ski-Doo Renegade X-RS 900 ACE Turbo?

This page covers what goes wrong on the 2021 Ski-Doo Renegade X-RS 900 ACE Turbo in general. The Kestrel report covers this specific car— the asking price vs. market, the photos, the seller's description, and a BUY / NEGOTIATE / WALK AWAY verdict with a negotiation script.

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Known issues on this page are based on documented owner reports, NHTSA complaints, class-action records, and manufacturer technical service bulletins. Individual vehicles vary. A pre-purchase inspection by a trusted mechanic is always worth doing.