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Home >> BMW >> 2017 >> 530i >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> Engine - Counterbalance Shafts/Drive Belts/Camshaft - Repair (G30) >> 11 28 V Belt With Belt TENSIONER And Idler Pulley >> 11 28 020 Replace belt tensioner for drive belt of the alternator (530i, 2017-2022, 530i xDrive, 2017-2022) >> Removing the belt tensioner

Removing the belt tensioner

WARNING: Working on 12 V electrical system.
Risk of short circuits! Risk of fire!
  • Make sure that there is no charger connected to the jump start terminal in the engine compartment.
  • Detach battery ground lead from battery.
  • For auxiliary batteries: Detach battery minus cables from all auxiliary batteries.
NOTE: RISK OF DAMAGE
Damage to battery terminal, the safety battery terminal or the intelligent battery sensor (IBS).
Damaged battery terminals can lead to malfunctions or vehicle electrical system faults.
  • Detach battery terminal from battery pole by carefully shifting to and fro. Do not pry off using a tool.

Preliminary work 

CAUTION: Component with preload.
Injury hazard!
  • Reduce preload as far as possible before disassembly. Relieve component.
NOTE: TECHNICAL INFORMATION
The belt tensioner must be installed to relieve the tension. The special tools or transportation retainers must be installed for disassembly.