How to Troubleshoot & Replace Bosch AP4050752 / 00448806 Spray Arm

I tried white vinegar to dissolve the crud. That worked a bit but after 9 years of use I thought we could buy these inexpensive replacement parts and be done. I was pleasantly surprised at how quickly the order was filled and the parts arrived. 

Replaced spray arms and filter. 

Replaced the lower spray arm. Upper discontinued. 

I replaced the filter which was clogged with mineral deposits and other stuff. I also noticed that both sprayer parts (upper and lower) were somewhat clogged too, so I also changed those. BTW -- Not only were Appliance Parts Pros' prices less expensive than other appliance sites and even Amazon, but the total cost including shipping was also $10 less than if I had ordered using Prime, and I received the parts days faster! 

It was great to easily be able buy replacement parts for my Bosch dishwasher. Simple fix since the lower sprayer, filter basket, and agent door were easily removed and the new parts snap in place. 

Just take the model # from the side door. Quick search and match via the drawings and select the two parts. The video helped show how easy it was to replace. Order... received a few days later and with 5 minutes I was done. Saves $200 in labor calling a repairman. 

New spray arm assemblies.