Replacing SRS components after deployment (Range Rover 3)

The information below provides instructions for replacing SRS components either as a result of a vehicle collision or as a result of normal vehicle aging.

WARNING: All SRS system components must be replaced after 15 years of service.

A collision that did not result in the deployment of airbags or seat belts

Check the condition of the load-bearing elements of the body in the impact zone. Pay special attention to the bumper frame, the condition of the side members and brackets.

A collision that resulted in the deployment of airbags or seat belts

The procedure for inspecting and replacing SRS components depends on the type and severity of the collision. The instructions provided contain the minimum amount of technical interventions that should be performed after the operation of certain components of the system.

Check the condition of the load-bearing elements of the body in the impact zone. Pay special attention to the bumper frame, the condition of the side members and brackets.

CAUTION: The SRS data control unit (DCU) must be replaced after any component of the system has deployed.

CAUTION: The side impact sensor must be replaced after each deployment of the side airbags. Only the sensor on the impacted side should be replaced.

Front airbag deployment (from the driver and passenger side)

If the front airbags have deployed, the following components must be replaced:

• Driver's front airbag
• Front passenger front airbag
• Additional wires (only if they are installed), connecting the front airbags to the SRS harnesses
• Front seat belt pretensioners
• Rear seat belt pretensioners - if equipped
• Driver's seat belt inertia reel - if installed
• Rotary contactor
• SRS Electronic Control Unit (DCU)

In addition, the following components should be checked and replaced:

• Tensioner (inertia reel) front passenger seat belt - check the condition of the belt, buckle lock, attachment point to the body
• Rear seat belt anchorages - check the condition of the belts, decorative buckle covers, attachment points to the body and the operation of the buckle locks
• Decorative trim on the front panel near the front passenger airbag
• Steering wheel
• Front seat frame and headrests
• Steering column - are there any signs of damage?; are the design adjustments in effect?
• Shoulder belt adjusters
• Rear seat belts

Side airbags

If the side airbags have deployed, the following system components should be replaced: (components on the side of the vehicle where the impact occurred must be replaced):

• Side airbag.
• Side impact sensors on both sides of the vehicle.
• SRS Electronic Control Unit (DCU)

In addition, the following components should be checked and replaced:

• Front seat belts - check the condition of the belts, inertia reels, buckle locks, and attachment points to the body
• Rear seat belt anchorages - check the condition of the belts, decorative covers, body attachment points and buckle locks
• Front seat frame and headrests
• Decorative door trim
• Shoulder belt adjusters
• Rear seat belts

Side curtain airbags

If the side curtain airbags have deployed, the following system components should be replaced: (components on the side of the vehicle where the impact occurred must be replaced):

• Side curtain airbags
• Additional wire between the gas generator and the SRS system harness
• Curtain airbag mounting brackets
• Interior trim panels
• Front seat belt pretensioners
• SRS Electronic Control Unit (DCU)
• Side impact sensors on both sides of the vehicle

In addition, the following components should be checked and replaced:

• Roof lining
• Mounting brackets
• Front seat belts - check the condition of the belt, inertia reels, buckle locks, attachment points to the body
• Rear seat belt anchorages - condition of belts, trim covers, buckle locks and attachment points to the body
• Associated decorative panels
• Shoulder belt adjusters

Rear-end car collision

If the seat belt pretensioners were deployed during a rear impact, the following components should be replaced:

• Front seat belt pretensioners.
• SRS Electronic Control Unit (DCU)
• Front and rear seat belt inertia reels deployed during impact.

The article is based on information from the website [LRman.ru]

In addition, the following components should be checked and replaced:

• Front seat frame and headrests
• Shoulder belt adjusters
• Front seat belts, inertia reels, buckle locks, body attachment points
• Rear seat belt anchorages - condition of belts, trim covers, buckle locks and attachment points to the body
• Side impact sensors on both sides of the vehicle

Scheduled replacement of SRS system components

The materials used for airbags and seat belt pretensioners deteriorate over time.

Therefore, after 15 years it is necessary to replace the airbags, seat belt pretensioners and rotary contactor.