Ninja TWISTi Blender DUO SS151: problems, parts and running costs
Checked: 2026-10-12
Summary
The Ninja TWISTi High-Speed Blender DUO SS151 is a compact 34 oz blender whose lid carries a built-in twist tamper, so thick mixtures get pushed down while it runs. The usual complaints are noise that peaks at 105.1 dB, a base that rocks at full speed, and a pitcher that is small for a crowd. There is no subscription or consumable, so a typical year costs only the occasional part — the blade assembly is $29.99 — and at $100 or less it is a strong buy for one or two people.
Common problems and fixes
- Noise — the most-mentioned complaint: ShouldIt measured peaks of 105.1 dB in 2026, Consumer Reports rated noise only “fair” in 2022, and Best Buy owners cite noise 20 times. There is no fix; it is inherent to the 1600 peak-watt motor. Warranty: one year limited, coverage not stated. [8][3][4]
- Base rocking — the unit rocks at full speed; Ninja added suction cups and rubber traction feet to counter it, and it still moves. Press down firmly or blend on a lower setting. Warranty: one year limited, coverage not stated. [2][8]
- Extra plastic parts — CNET warns that the twist tamper mechanism and drizzle cap add parts that raise breakage potential. Handle the lid and cap gently; replacements are sold separately. Warranty: one year limited, coverage not stated. [2]
- 34 oz capacity — the pitcher is small for a full-size blender; ShouldIt calls it personal or small-family size and not for serving a large household in one go. Batch smaller or use the single-serve cups. Warranty: one year limited, coverage not stated. [8]
Parts and consumables
- 34 oz Power Pitcher ($38.99, SharkNinja, 2026) — replacement interval not reported. [1]
- Hybrid Edge blade assembly ($29.99, SharkNinja, 2026) — replacement interval not reported; it is removable and interchangeable across all three containers. [1][8]
- Pitcher lid with twist tamper ($33.99, SharkNinja, 2026) — replacement interval not reported. [1]
- Spout lids ($9.99, SharkNinja, 2026) — replacement interval not reported. [1]
- 18 oz cup ($14.99, SharkNinja, 2026) — replacement interval not reported. [1]
- 24 oz cup ($18.99, SharkNinja, 2026) — replacement interval not reported. [1]
Yearly running cost
There is no filter, pod, subscription or other consumable, so a year of normal use costs only electricity plus the occasional part. The main wear item is the blade assembly at $29.99 (SharkNinja, 2026), so a year in which the blade is replaced costs $29.99; add a pitcher for $38.99 if one cracks. The motor has a thermal shutoff that needs a 15-minute cooldown, and manual mode caps each press at 60 seconds. [1][8]
When it is a good buy
- At $99.99 on sale at SharkNinja direct in 2026 (list $119.99, save $20) it is a strong buy for one or two people who blend daily. [1]
- Nebraska Furniture Mart listed it at $109.99 on sale in 2026, against a suggested retail of $179.99. [9]
- Target lists it at $139.99 in 2026; above $140 the feature set does not justify the price. [5]
- Ninja Professional Plus DUO (BN751) — the better choice when you need bigger batches, because it has a 72 oz pitcher. [6]