2021 Hyundai Elantra hev problems

Common 2021 Hyundai Elantra hev problems

The 2021 Hyundai Elantra HEV has been subject to a recall due to a software error in the Motor Control Unit (MCU) that may cause unintended vehicle acceleration after the brake pedal is released. This issue affects 37,997 Elantra hybrid sedans from the 2021-2023 model years. The problem arises when a transmission/drive motor synchronization fault is detected while driving, triggering a "fail-safe" condition that temporarily results in slow, unintended acceleration after release of the brake pedal. This unintended acceleration could potentially lead to a crash, making it a critical safety concern for Hyundai.

The recall was issued after Hyundai found 24 unconfirmed reports of the problem and conducted an internal investigation. The acceleration issue is apparently related to the handoff between gas and electric powertrain components, but Hyundai has not seen any injuries or crashes from the problem. Owners of the affected vehicles will be notified by mail and can bring their vehicle into a local Hyundai dealership for repairs free of charge. The repair process involves updating the Motor Control Unit software logic to fix the issue, which can be done at a dealer. Hyundai will also cover any out-of-pocket expenses owners incurred before and during the repair process.

In addition to the recall, there have been other issues reported for the 2021 Hyundai Elantra, including seat belt, airbag, acceleration, and other problems. Another owner experienced issues with the forward collision sensors mid-road trip, which caused the cruise control to kick off and sensor warnings to come on. After several weeks and multiple visits to the dealership, the issue was still not resolved, and the car began lunging suddenly when slowing down or stopped, creating a serious safety issue for rear-end collisions.

In summary, the 2021 Hyundai Elantra HEV has been subject to a recall due to a software error in the Motor Control Unit that may cause unintended vehicle acceleration after the brake pedal is released. This issue, along with other reported problems such as seat belt, airbag, and acceleration issues, highlights the importance of staying informed about recalls and potential problems with your vehicle.

What are the problems with the 2021 Hyundai Elantra Hybrid Limited?

Hyundai is recalling 37,997 Elantra hybrid sedans from the 2021-2023 model years because a motor control unit (MCU) software error may allow the car to move unexpectedly when the brake pedal is released. Such unexpected acceleration could result in a crash.

How reliable is the 2021 Hyundai Elantra?

The 2021 Hyundai Elantra has a predicted reliability score of 80 out of 100. A J.D. Power predicted reliability score of 91-100 is considered the Best, 81-90 is Great, 70-80 is Average and 0-69 is Fair and considered below average.

What are the top problems with Hyundai Elantra?

There have been reports of window regulator failure, weak and foggy headlights, difficulty steering, and even loss of brake power. If these problems are ones that you have, we suggest taking your vehicle into the dealership or to the nearest mechanic.

What is the transmission problem on the 2021 Hyundai Elantra?

If you don't routinely and repeatedly change your fluids at least each 30,000 miles or so, you may find that your 2021 Hyundai Elantra transmission will quickly slip. Check your car's owner's manual for more data on the specific mileage intervals in which your transmission needs the fluid changed.

2021 Hyundai Elantra hev car problems categorized by type of issue

After analyzing all complaints sent to the NHTSA and researching popular Hyundai Elantra hev problems, we found that the most common problems with these 2023 model year vehicles are:

• Engine problems
• Vehicle speed control problems

The graph below shows statistics for all 2021 Hyundai Elantra hev vehicle components and the number of complaints received.