Dishwasher Not Cleaning? Lower Spray Arm 11011646 – Fix Poor Wash Performance Fast
If your Bosch dishwasher is leaving dishes dirty, spotted, or with food residue after a full cycle, a cracked or clogged lower spray arm is the most common cause. In most Bosch dishwashers, the lower spray arm rotates under water pressure to blast water upward through the lower rack. When it cracks, warps, or its nozzles become blocked, water distribution collapses — dishes in the lower rack come out dirty, and the wash cycle runs longer trying to compensate. ⚡ High-wear component in Bosch 300, 500, and 800 series dishwashers — typically the first spray arm to fail. Part 11011646 is the genuine OEM lower spray arm that restores full water coverage and brings your dishwasher back to factory cleaning performance.
❓ Is This the Right Part?
This is the correct fix if ALL of the following are true:
- ✔ Dishwasher powers on and runs a full cycle
- ✔ Upper rack dishes come out clean but lower rack dishes do not
- ✔ Water supply and inlet valve confirmed OK — machine fills normally
- ✔ ONLY problem is poor cleaning, spotting, or food residue on lower rack items
Not sure? Send us your model number — we'll confirm before you order.
🔧 Common Symptoms
- Lower rack dishes come out dirty or with food residue after a full cycle
- Spray arm visibly cracked, warped, or broken at the hub or nozzle tips
- Spray arm does not spin freely when rotated by hand
- Unusual rattling or grinding noise during the wash cycle
- White mineral deposits blocking spray nozzles causing uneven water distribution
✔ If these symptoms match, this is the most likely failed component in the system.
✔ In most cases, replacing this lower spray arm restores full cleaning performance immediately after installation.
📦 Part Details
- Part Number: 11011646
- Type: Lower Spray Arm — rotates under water pressure to distribute wash water across the lower rack
- Replaces: 00611475, 611475, 00611476, 611476
- Brands: Bosch, Thermador, Gaggenau (Bosch-built platforms)
- Condition: Genuine OEM — direct factory replacement
While the lower rack is out, inspect the spray arm hub and bearing ring (part 00611476 / 611476) and the filter assembly. A clogged or damaged filter is often the root cause of spray arm blockage — replacing both at the same time prevents the new arm from failing prematurely and restores full wash system performance in one service call.
⚙️ Installation
Skill Level: Easy — 5 to 10 minutes. No tools required. Disconnect power before servicing. Pull out the lower rack completely. Grasp the old spray arm at the centre hub and turn counterclockwise to unscrew it from the mount post. Snap or thread the new 11011646 arm onto the post clockwise until it locks, then verify it spins freely. Reinstall the lower rack and run a short cycle to confirm full rotation and cleaning performance.
✓ Compatible Models
Confirmed compatible with SHE3AR72UC, SHE3AR75UC, SHE3AR76UC, SHE3ARF2UC, SHE3ARF5UC, SHE3ARF6UC, SHEM3AY55N, SHS5AV52UC, SHS5AV55UC, SHS5AV56UC, SHS5AVF2UC, SHS5AVF5UC, SHS5AVF6UC, SHX3AR72UC, SHX3AR75UC, SHX3AR76UC, SHX5AV52UC, SHX5AV55UC, SHX5AV56UC, SHX5AVF5UC, SHXM4AY55N plus additional Bosch and Thermador models. Contact us to verify your model number before ordering.
💡 Pro Tip
Before ordering a new spray arm, remove the existing arm and hold it up to a light source. If you can see blockage in the nozzle holes, soak the arm in white vinegar for 30 minutes and use a toothpick to clear each port. If the arm is cracked, warped, or the hub is stripped, replacement is the only fix — and 11011646 is the correct OEM part. This 5-minute check can save you an unnecessary purchase.
✓ Model-Specific Repair Pages
✅Compatibility & Cross Reference
Not sure about your model number? Call 1-877-899-7278 and we’ll help you confirm. All brand names are the property of their respective owners and are used for compatibility reference only.
Buy Online Pick Up In-Store
Kitchener, Ontario N2E 1W8
- Choosing a selection results in a full page refresh.
