← View Generic B3918 Guide
Severity: Medium
🚗
Vehicle-Specific Guide
This guide is customized for your 2014 Nissan SENTRA
B3918: B3918: Body System Security Malfunction
on 2014 Nissan SENTRA
Fix Cost
$100 - $500
Parts & Labor
Difficulty
3/5
1-2 hours
DIY Possible?
❌ No
Pro recommended
Your Vehicle
2014 Nissan
SENTRA
⚠️
Important for 2014 Nissan SENTRA Owners
Before starting repairs, verify which engine your 2014 Nissan SENTRA has. Check your VIN or engine code to ensure you order the correct parts.
📖 What Does B3918 Mean on 2014 Nissan SENTRA?
The body control module (BCM) has detected a security-related issue, such as a tamper attempt or a malfunction in the security system.
⚠️
Symptoms
- • Alarm sounds
- • doors lock/unlock randomly
- • security light flashes
🔍
Common Causes
- • Faulty BCM
- • faulty security sensor
- • tamper attempt
- • wiring issue
🛠️
How to Fix B3918 on 2014 Nissan SENTRA
1. Check BCM for faults and clear any trouble codes. 2. Inspect and clean security sensors. 3. Check wiring for damage or corrosion. 4. Replace BCM or security sensor if faulty.
🔧
Need Maintenance Info for Your SENTRA?
Get oil capacity, filter specs, and torque settings for your specific 2014 Nissan SENTRA.
View 2014 Nissan SENTRA SpecsParts for 2014 Nissan SENTRA
Essential Tool
🔗
Related Diagnostic Codes
Other codes that may appear with B3918
B3916
Sequential Code
B3916: Seat Position Sensor Circuit Malfunction
Medium
B3917
Sequential Code
B3917: Exterior Lighting Malfunction
Medium
B3919
Sequential Code
B3919: Audio System Malfunction
Medium
B3920
Sequential Code
B3920: Airbag System Malfunction
High
💡 Why These Codes Are Related:
- • Similar Issues: Same root cause or component failure
- • Related Problems: Often occur together due to system interactions
- • Sequential Codes: Progressive failure stages or multiple sensors
- • Same System: Components within the same automotive system