IronBox BMW E36 Rear Trailing Arm Pocket Reinforcement Plate Kit

The IronBox reinforcement plate kit is designed to strengthen the rear trailing arm mounting pockets of the BMW E36 chassis
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Age, drifting, track use, stiff suspension bushings, and repeated drivetrain and suspension loads can cause cracking or separation around the rear trailing arm bracket mounting points
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The 3 mm steel plates are welded to the vehicle body around the mounting pockets to distribute these loads across a larger area and reinforce this known weak point
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Main features
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• Rear trailing arm pocket reinforcement — strengthens the body around the rear trailing arm bracket mounting points
• Helps prevent chassis cracking — distributes suspension loads across a larger section of the mounting pocket
• Suitable for preventive reinforcement — can be installed before visible cracks or separation develop
• Suitable for professional chassis repair — can be installed after existing cracks and damaged mounting points have been correctly repaired
• 3 mm steel construction — provides additional rigidity around the factory threaded mounting points
• Weld-in installation — creates a permanent structural connection with the vehicle body
• Raw weld-ready finish — supplied without coating for correct welding and subsequent corrosion protection
• Designed and manufactured in Ukraine by IronBox

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Compatibility
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• BMW 3 Series E36
• BMW E36 Sedan
• BMW E36 Coupe
• BMW E36 Touring
• BMW E36 Convertible
• BMW E36 M3

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Not compatible with BMW E36 Compact or 318ti
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BMW E46 compatibility is not confirmed and must not be assumed from the older IronBox product URL
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Not intended for reinforcing the rear subframe mounting points
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These plates reinforce the rear trailing arm bracket mounting pockets in the vehicle body
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Kit includes
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• Weld-in rear trailing arm pocket reinforcement plate set

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Required parts — not included
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• Rear trailing arm bushings
• Rear trailing arm brackets
• Welding and bodywork consumables

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Important installation information
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The rear trailing arms and mounting brackets must be removed or moved away from the installation area
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The mounting pockets must be stripped of paint, underseal, seam sealer, corrosion, and contamination before inspection
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The factory threaded inserts and surrounding sheet metal must be carefully checked for cracks or separation
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Existing cracks and damaged mounting points must be correctly repaired before the reinforcement plates are welded in place
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The plates must not be welded directly over untreated cracks or corrosion
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After welding, all repaired areas must receive suitable seam sealing, primer, paint, underbody protection, and internal cavity protection
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Rear suspension geometry must be checked after reassembly and a complete wheel alignment is recommended
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Installation must be carried out by a qualified welder or workshop experienced with BMW chassis reinforcement