Bosch 00646364 Tassimo Water Tank – Blue (TAS4511UC / TAS4515UC)

Tassimo Water Tank – Bosch

The Bosch/Tassimo 00646364 water tank is the removable blue reservoir that holds the water supply for the Tassimo brewing system. When the tank cracks, leaks, or the fill cap fails, the machine cannot maintain a water supply for brewing and water may leak onto the counter or inside the machine. This direct-replacement water tank restores the full water reservoir capacity for compatible Tassimo TAS4511UC and TAS4515UC models.

Compatible Part Numbers

• 00646364
• 646364
• AP4359175

Compatible Models

Bosch Tassimo TAS4511UC, TAS4515UC, Mavea TAS4 series

Key Features

• Direct OEM-spec replacement – blue water tank engineered to Bosch/Tassimo factory specifications for correct volume, valve, and seat fit
• Restores full water reservoir capacity –mates to the machine's water draw valve to supply the full brewing cycle water volume
• Removable for easy filling and cleaning – lifts out for filling at the sink and wiping clean
• Drop-in installation – seats into the existing tank slot at the rear of the machine

Fixes These Symptoms

• Water tank cracked, leaking, or water pooling under or around the machine
• Machine displaying a low-water or empty-tank alert when the tank appears full due to a sensor or valve fault
• Water tank fill cap or base valve damaged, preventing water from feeding into the machine
• Tank discolored, stained, or physically damaged beyond cleaning

Compatible Brands

• Bosch Tassimo

Always verify your model number before ordering. Check the label on the bottom of your Tassimo machine to confirm compatibility.