B0020 on NISSAN ALTIMA — Left Side Airbag Deployment Control

Q: "What does B0020 mean on a NISSAN ALTIMA?"

"B0020 indicates: Left Side Airbag Deployment Control. This is a body electrical code. 20 NISSAN ALTIMA owners have reported this to NHTSA."

Q: "What are the most common causes of B0020 on NISSAN ALTIMA?"

"Based on 20 NHTSA reports, the most commonly cited components are: Air Bags, Air Bags,Seats. These percentages are based on the component field in owner complaints."

Q: "Is B0020 serious on my NISSAN ALTIMA?"

"Of 20 NHTSA reports for this code on NISSAN ALTIMA, none involved a crash or fire. However, any diagnostic code should be evaluated by a qualified mechanic."

Q: "What should I do if my NISSAN ALTIMA shows B0020?"

"1) Check for recalls on your VIN at nhtsa.gov/recalls. 2) Get a professional diagnosis — a code alone doesn't identify the exact failed part. 3) Get 2-3 repair estimates to compare."

What B0020 Means on Your NISSAN ALTIMA

B0020 is a diagnostic trouble code indicating: Left Side Airbag Deployment Control. This code relates to the body electrical system. The vehicle's computer detected a condition outside normal operating parameters and stored this code.

20 NISSAN ALTIMA owners have reported this issue to NHTSA across model years 2013-2018. Most reports come from the 2016, 2017 model years. The most commonly reported component is Air Bags (85.0% of reports).

Real NISSAN ALTIMA Owner Reports

Source: NHTSA Complaints Database

"Supplemental Airbag Warning Light solid red, does not go off. Occurred after oil change done at dealership 1/13/2025. Dealer found code B0020, recommended part 87650-3TD6G, seat back replacement, parts and labor for repairs $2,950."

— 2014 NISSAN ALTIMA owner · AIR BAGS,SEATS · Filed 08/13/2025

"The air bag system light comes on, the code is B0020 - Side A/B module LH, and I am able to reset the system with a code scanner. The light goes out and operates normally for a few days or weeks, then without warning the A/B illuminates again for no apparent reason."

— 2014 NISSAN ALTIMA owner · AIR BAGS · Filed 06/15/2023

"Airbag light came on and the error code was b0020, which is the drivers side, they reset at the dealer. it came back on a week later and i took it back. they told me they checked the wires and it all looked fine."

— 2014 NISSAN ALTIMA owner · AIR BAGS · Filed 05/05/2019

"My air bag light stays on in my dash. went to my local dealer to find out an old code b0020-13 was detected. they found everything to be fine, so they reset the code. the air bag light came back on two days later, and the same code came on again."

— 2014 NISSAN ALTIMA owner · AIR BAGS · Filed 07/02/2019

"Airbag light came on in September 2021.Took to dealership on October 5, 2021. They ran a diagnostic test and charged me $160 to tell me that code B0020 Aide Airbag Module Left Side is open. I purchased extended warranty when car was purchased new. Platinum plan $2098."

— 2015 NISSAN ALTIMA owner · AIR BAGS · Filed 09/15/2021

All reports filed by vehicle owners directly with the U.S. Department of Transportation.

📊 Complaint Trend by Model Year

1

'13

4

'14

3

'15

5

'16

5

'17

2

'18

Common Causes on NISSAN ALTIMA

Based on NHTSA complaint component analysis for this vehicle.

AIR BAGS 85%

AIR BAGS,SEATS 15%

What To Do Next

1
Check for recalls on YOUR VIN
Go to nhtsa.gov/recalls and enter your VIN. If your vehicle is covered, repairs are free.
2
Get a proper diagnosis
A code alone doesn't tell you the exact failed part. A diagnostic at a shop ($50–$150) pinpoints the root cause before you spend money on parts.
3
Compare repair quotes
Get 2–3 quotes. Dealer vs. independent shop prices often differ 30–50% for the same repair.

Frequently Asked Questions

What does B0020 mean on a NISSAN ALTIMA? ▾

B0020 indicates: Left Side Airbag Deployment Control. This is a body electrical code. 20 NISSAN ALTIMA owners have reported this to NHTSA.

What are the most common causes of B0020 on NISSAN ALTIMA? ▾

Based on 20 NHTSA reports, the most commonly cited components are: Air Bags, Air Bags,Seats. These percentages are based on the component field in owner complaints.

Is B0020 serious on my NISSAN ALTIMA? ▾

Of 20 NHTSA reports for this code on NISSAN ALTIMA, none involved a crash or fire. However, any diagnostic code should be evaluated by a qualified mechanic.

What should I do if my NISSAN ALTIMA shows B0020? ▾

1) Check for recalls on your VIN at nhtsa.gov/recalls. 2) Get a professional diagnosis — a code alone doesn't identify the exact failed part. 3) Get 2-3 repair estimates to compare.