What Does U0453 Mean?
The receiving module is getting invalid or corrupted data from the left side airbag control module. This affects the side impact protection system on the driver's side.
Safety Warning
Critical safety issue. Left side airbags and curtain airbags may not deploy in a side-impact collision. SRS warning light will be illuminated. Immediate repair required.
Common Causes
35%
Failed left side restraints control module with internal defect
30%
Damaged wiring harness or connector to left side restraints module
20%
Faulty left side impact sensor or side pressure sensor
10%
Low voltage or poor ground connection at left side module
5%
Water intrusion or corrosion in door-mounted components
Diagnostic Steps
1
Step 1: Access left side restraints module data stream and identify which parameter is reading as invalid or out-of-range
2
Step 2: Inspect left door area and B-pillar for previous collision damage or water intrusion; check module mounting and connector condition
3
Step 3: Test voltage and ground at left side restraints module connector; verify stable power supply and ground resistance below 0.5 ohms
4
Step 4: Check resistance values of left side impact sensors, side airbag squib, and seat belt pretensioner per manufacturer specifications
5
Step 5: If all circuits test good, replace left side restraints control module and perform system relearn/calibration procedure
Estimated Repair Cost
$250 - $1,200
Parts + labor, varies by vehicle and location
The receiving module is getting invalid or corrupted data from the left side airbag control module. This affects the side impact protection system on the driver's side.
The most common cause of U0453 (Invalid Data Received From Side Restraints Control Module Left) is: Failed left side restraints control module with internal defect
Typical repair costs for U0453 range from $250 to $1,200, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Critical safety issue. Left side airbags and curtain airbags may not deploy in a side-impact collision. SRS warning light will be illuminated. Immediate repair required.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to U0453 to identify the root cause.
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Quick Info
Category
Network
System
Supplemental Restraint System (SRS) - Left Side
Difficulty
Type
Generic (SAE)
Recommended Tools
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