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Home >> Audi >> 2025 >> Q4 e-tron Prestige >> Repair and Diagnosis >> Body & Frame >> Exterior Body Panels >> Body Center, Chassis, Roof >> 51 Body Center, Chassis, Roof >> B-Pillar Reinforcement, Replacing >> Procedure

B-Pillar Reinforcement, Replacing: Procedure

Separating Points

CAUTION:

Risk of injury due to flying metal shavings.

Irritation and injury to skin and eyes possible.

- Wear protective eyewear.

- Wear safety gloves.

CAUTION:

Do not damage the reinforcements below.

- Re-welding the reinforcements is not permitted due to safety reasons.

-- Secure the body with Mechanical Door Brace.

-- Loosen the original joint using Spot Weld Breaker and One-Handed Angle Grinder.

-- Remove the B-pillar reinforcement -1- from the body and remove.

GWWN51-14871Courtesy of AUDI OF AMERICA, LLC

-- Remove the remaining material using the One-Handed Angle Grinder.

-- Grind down the welding surfaces to bare metal using the One-Handed Angle Grinder.

-- Completely remove any residual adhesive and grind down the adhesive surface to bare metal using the One-Handed Angle Grinder.

GWWN51-14872Courtesy of AUDI OF AMERICA, LLC

Replacement Parts

New Part, Preparing

-- Use the One-Handed Angle Grinder to sand the adhesive surfaces and welding surfaces to bare metal.

-- Transfer the position and number of holes for the gas-shielded arc plug weld seam near the side sill from the removal procedure to the B-pillar reinforcement -1-.

-- Transfer the position and number of holes for the gas-shielded arc plug weld seam near the roof pillar reinforcement from the removal procedure to the B-pillar reinforcement -1-.

-- Drill 8 mm diameter holes for the gas-shielded arc plug weld seam using the Drill.

-- Clean the adhesive surfaces using Silicone Remover :LVM 020 000 A5  .

GWWN51-14873Courtesy of AUDI OF AMERICA, LLC

Welding

-- Clean the adhesive surfaces using Silicone Remover :LVM 020 000 A5  .

-- Apply Two-Part Body Adhesive :D 180 003 M3  on the entire surface using the Double Cartridge Gun.

GWWN51-14874Courtesy of AUDI OF AMERICA, LLC

-- Fit the new part to the vehicle with Portal Gauge resting on the Alignment Bracket Set and secure.

-- Check the fit with attachments.

-- Weld the B-pillar -1- reinforcement using a Resistance Spot Welder with a straight-line spot weld seam.

-- Weld in the B-pillar reinforcement -1- with a gas-shielded arc plug weld seam using a Gas-Shielded Welder.

GWWN51-14875Courtesy of AUDI OF AMERICA, LLC

-- B-Pillar, Installing. Refer to B-PILLAR, REPLACING .