Potential hydrogen gas leaks have been identified, stemming from faulty sensors or a malfunctioning pressure relief device. This poses a significant safety risk. Estimated repair cost: $500 - $2,000.

Electrical System Faults

Complaints indicate issues within the electrical system, which can affect various vehicle functions. Estimated repair cost: $300 - $1,500.

Forward Collision Avoidance Failure

The automatic emergency braking system has reportedly failed to engage, posing a significant safety risk. Estimated repair cost: $500 - $2,500.

CARFOCALvehicle research

2021 Hyundai Nexo Maintenance guide

Name: Maintenance dataset for 2021 Hyundai Nexo
Creator: Carfocal

v1.0Updated May 30, 2026Daniel Wilson4 Sources Analyzed4 Critical Recalls

MAINTENANCE SUMMARY

The 2021 Hyundai Nexo, with a combined MPG of 57, presents a unique maintenance profile. Owners should prioritize vigilance regarding its hydrogen fuel system, a key area for reported issues.

View Critical Issue: Engine/Propulsion System Failure

Subscribe to Recall Alerts Subscribe to Recall Alerts

Reliability Score

Est. Annual Maintenance Cost

$300 - $700

TSBs & Recalls

1 TSBs | 4 Recalls

CarFocal account required

Unlock the Full 2021 Hyundai Nexo Maintenance Guide

Create a free account to reveal the full service schedule, repair costs, and deeper diagnostic data.

Key Takeaways

Prioritize inspection and maintenance of the hydrogen fuel system due to documented leak risks.
Be aware of potential electrical system faults and propulsion system power loss.

2 more takeaways unlock below

Critical service intervals

Common failure analysis

Symptoms and prevention guidance

2021 Hyundai Nexo Maintenance guide

v1.0Updated May 30, 2026Daniel Wilson4 Sources Analyzed4 Critical Recalls

MAINTENANCE SUMMARY

The 2021 Hyundai Nexo, with a combined MPG of 57, presents a unique maintenance profile. Owners should prioritize vigilance regarding its hydrogen fuel system, a key area for reported issues.

View Critical Issue: Engine/Propulsion System Failure

Subscribe to Recall Alerts Subscribe to Recall Alerts

Reliability Score

Est. Annual Maintenance Cost

$300 - $700

TSBs & Recalls

1 TSBs | 4 Recalls

CarFocal account required

Unlock the Full 2021 Hyundai Nexo Maintenance Guide

Create a free account to reveal the full service schedule, repair costs, and deeper diagnostic data.

Key Takeaways

Prioritize inspection and maintenance of the hydrogen fuel system due to documented leak risks.
Be aware of potential electrical system faults and propulsion system power loss.

2 more takeaways unlock below

Critical service intervals

Common failure analysis

Symptoms and prevention guidance