If you own a 2021 Tucson and have heard about Hyundai's engine problems, you may be concerned about your vehicle. The Theta II engine family has been subject to recalls and warranty extensions, and understanding what applies to your specific vehicle is important for your peace of mind.
The Theta II Story
The 2.0L and 2.4L Theta II engines in various Hyundai and Kia vehicles experienced manufacturing issues that could lead to connecting rod bearing wear and catastrophic engine failure. This resulted in:
- Multiple recalls
- Class action lawsuits
- Extended warranty coverage
- Knock Sensor Detection System (KSDS) software updates
What Engine Does Your 2021 Tucson Have?
The 2021 Tucson was a transition year:
- Base/Value editions: 2.0L Theta II engine
- SEL and above: May have 2.4L Theta II
- Limited/N Line: May have 2.4L or updated engine
Check your VIN with Hyundai to determine your exact engine and any applicable recalls.
Warning Signs to Watch
- Engine knocking or ticking noise
- Rough running or vibration
- Check engine light with P1326 code
- Sudden loss of power
- Stalling
- Metal debris in oil
What Hyundai Has Done
- KSDS Software: Monitors engine for bearing wear sounds
- Extended Warranty: Up to 15 years/150,000 miles on some engines
- Recalls: Various campaigns for engine replacement
- Settlement: Reimbursement for related repairs
What You Should Do
- Check your VIN at Hyundai's recall site
- Ensure KSDS software is installed (dealer can verify)
- Keep all oil change records
- Report any unusual engine noises immediately
- Don't ignore check engine lights
If Your Engine Fails
If you experience engine failure:
- Stop driving immediately
- Contact Hyundai roadside assistance
- Request towing to an authorized dealer
- Document everything—sounds, warning lights, mileage
- Keep all receipts and paperwork
Coverage Information
Affected engines may have coverage of:
- Original owner: Up to 15 years/150,000 miles
- Subsequent owners: Up to 10 years/100,000 miles
Verify your specific coverage with Hyundai customer service or your dealer.