41 14 021 Replacing Front Left Wheel Arch

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This instruction is only applicable the first time the wheel arch is replaced! Repeated replacement is only permitted after consultation with and approval by BMW. Should you have any questions, please contact the country-specific Hotline.

If the wheel arch has not yet been replaced, this can be recognized from the punch rivets (1) fitted at the factory.

If replacing the wheel arch, replace the punch rivets with blind rivets (2).

Fig 1: Identifying Punch Rivets And Blind Rivets

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Read contents of BODY, GENERAL .

The steel-aluminium mixed construction is used on the vehicle.

Observe specific procedure , see 41 00... Bonding aluminum on steel and 41 00... Riveting aluminum parts .

Remove or cover those vehicle components in the repair area which are susceptible to heat or dust.

Use only approved spot-welding apparatus for repairs, see WORKSHOP EQUIPMENT .

Place vehicle on straightening bench.

(1) Wheel arch, front
(2) Reinforcement, support carrier

Fig 2: Identifying Wheel Arch And Reinforcement

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Open weld joints in area (1).

Fig 3: Identifying Weld Joints Area

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Open weld joints in areas (1).

Fig 4: Identifying Weld Joints Area

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Open weld joints in area (1).

Fig 5: Identifying Weld Joints Area

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Mark severance cut in accordance with measurement a and cut support carrier.

Measurement a=50 mm before 20 mm dia. bore

Open weld joints in area (1).

Installation:

Weld in reinforcement plate at severance cut, see 41 00... Welding in reinforcement plate (steel plate) .

Fig 6: Identifying Cut Mark Area And Weld Joints Area

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Open weld joints in area (1).

Fig 7: Identifying Weld Joints Area

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Drill out riveted joints in areas (1) to (3).

Open adhesive joints in areas (1) to (4), see 41 00... Opening bonded connections .

Installation:

Adjust new part to fit with straightening attachment or universal mount.

In areas (2) and (3) carry over new rivet holes from engine carrier to wheel arch and drill.

Use 11 N2 rivets in areas (2) and (3), see 41 00... Overview of consumables (Electronic Parts Catalogue - EPC) .

Fig 8: Identifying Riveted Joints Area And N2 Rivets Areas

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IMPORTANT: To avoid contact corrosion, do not grind the new wheel arch part in the area of the adhesive surfaces , see 41 00... Bonding aluminum on steel .
Grind bonding surfaces on engine carrier blank.

Clean bonding surfaces with isopropanol or isohexane.

Fig 9: Identifying Holes

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Installation:

New rivet positions are required for strength reasons.

Drill new rivet holes (1) as shown in picture.

In so doing, maintain a minimum distance of 10 mm to lower component edge.

Use 14 N2 rivets , see 41 00... Overview of consumables (Electronic Parts Catalogue - EPC)

Glue new component with adhesive K1 , see 41 00... Overview of consumables (Electronic Parts Catalogue - EPC) .

Installation:

For accessibility reasons, move rivet (1) 15 mm forwards (2).

Fig 10: Identifying Rivet Holes And Rivet

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