Most Bosch installation problems don’t look like installation problems. They look like: shaking, walking, loud spin, leaks, or “why is it not draining?”
Here’s the clean setup path Bosch expects. 
Step 1: Remove the transport locks (non-negotiable)
Bosch ships the washer with 4 transport safety bolts on the back. If you run the machine before removing them, vibration and damage risks jump fast.
Bosch’s sequence (simplified):
- Pull hose out of holders
- Unscrew all 4 transport screws (wrench size 13) and remove
- Remove power cord from holder
- Remove the 4 sleeves
- Insert the 4 cover caps and slide them down
Keep the screws + sleeves — you’ll need them for transport later.
Step 2: Connect the water inlet correctly (and avoid slow leaks)
Bosch notes: tighten inlet connections by hand, avoid unnecessary adapters, and confirm the tap specs.
Connection notes from the manual:
- Standard tap connection: 3/4″ (26.4 mm)
- If using 1/2″ (21 mm): install the adapter with sealing washer first
- Open the tap carefully and check for leaks
Also important: Bosch specifies operation with cold tap water only.
Step 3: Drain hose placement (prevents backflow and pop-offs)
Bosch warns the drain hose is pressurized during pumping and can slip off if not secured.
They also set a key limit: max pumping height 100 cm.
Typical drain setups mentioned:
- Siphon connection (secure with hose clamp)
- Sink drain (fix with a hose guide / pipe bracket accessory)
- Standpipe with rubber sleeve or drain grate (fix with a hose guide)
Step 4: Leveling (the secret “quiet mode”)
If your Bosch is “walking,” it’s usually leveling.
Bosch’s leveling method:
- Loosen lock nuts (wrench size 17)
- Turn the feet until level (use a spirit level)
- Tighten lock nuts against the cabinet while holding the foot
Every foot must stand firmly on the floor.
Step 5: Run the first wash (without laundry) — yes, it’s a setup step
Bosch recommends a first wash without laundry to remove water residues from factory testing.
First-run program Bosch specifies:
- Set program to Cotton 90°C
- Add about 1 liter of tap water into compartment II
- Add washing powder with oxygen bleach into compartment II
- Use half the usual detergent dose (avoid excess foam)
- Start the program; display will show remaining time; end shows “End”
Two small settings that help in real life
- SpeedPerfect: reduces program duration (energy use increases, wash result not reduced).
- Child lock: hold the two child-lock buttons for ~3 seconds to toggle.