Ninja blender replacement parts turn a cracked cup, a leaking blade or a split lid into a twenty-dollar repair. Four of them, priced from $14.99 to $21.25, are checked below against their live Amazon listings.
The catch is fit. Ninja has shipped bases with a 3.35 inch and a 4 inch blade diameter, 6-fin and 7-fin blades, and 72 oz pitchers with two different rim shapes. Buy the wrong part and it simply will not seat.
This guide gives you the three measurements to take before you order, then names the exact model families each part lists, so you can match your own machine instead of guessing from a photo.
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Quick picks — all 4
Key Takeaways
- Four Ninja blender replacement parts spanning cups, blades and a pitcher lid, priced from $14.99 to $21.25
- Ratings run from 5.0/5 across 43 ratings to 4.6/5 across 2,900 – the high-score small samples are early evidence, not proof
- Every fit decision is a diameter, a fin count or a rim shape, and all three are stated on the listings quoted below
What Replacement Parts Cost Next to a New Blender
Across these four the price band runs from $14.99 to $21.25, and no single part in it costs enough to make a new machine tempting. The practical buying rule is to replace what failed and keep the rest: a cup set if the blending cup is scratched or the drink lid lost its seal, a blade if the base is leaking or the fins are bent, a lid if the pitcher is cracked at the pour spout.
One more number is worth knowing before you order a pitcher blade. The 72 oz replacement blade here is listed for bases between 1000 and 1500 watts, which covers most full-size Ninjas but not the higher-output commercial models. Check the rating plate under your base before you commit.
1. 18 Oz Replacement Cups for Ninja Blender, 2 PackMost ratings here (2,900)Sponsored
This is the part most people actually need: the 18 oz cup you blend into and then drink from. The set ships two cups and two sip-and-seal lids, so a household can keep one blending and one drinking instead of washing between smoothies.
The listing sizes it for blender bases with a 4 inch (10 cm) blade diameter and names the families it fits – BL450, 455, 456 and 480D, the Auto-iQ NN100 and NN101, BL910, and the SS101 and SS151 personal blenders. Heat-resistant plastic takes hot soup as well as frozen fruit, and at 4.6 stars across 2,900 ratings it is the most proven part in this group.
Anyone whose single-serve cup is clouded, cracked, or missing the lid it drinks from.
✅ Pros
- Two cups and two drink lids in one box
- Blend, seal and carry without decanting into another container
- Rated for hot and cold liquids on the listing
❌ Cons
- Fits only 4 inch blade bases – measure before ordering
- Not the part for a 72 oz pitcher
Current Price: $21.25
2. 7-Fin Blade Replacement for Ninja 18, 24 and 32oz CupsLowest price here ($14.99)Sponsored
A blade is a wear item, and the tell is a damp ring on the base after blending. This one is a 7-fin male blade on a 4 inch base for 18, 24 and 32 oz cups, made from food-grade stainless steel with a plastic collar.
The compatibility list runs across the Ninja Foodi Power Blender family – SS100, SS101, SS150, SS151, SS300, SS350 and SS351, plus CO101B and CO351B – and the listing is blunt about the two exclusions: it will not fit a 3.35 inch base and it will not fit a 6-fin housing. Those are the exact returns that make replacement blades a scary purchase, so the warning is the useful part.
Owners of an SS-series personal blender whose blade collar has started to weep.
✅ Pros
- Seven fins grip ice in single-serve cups
- Covers a wide SS-series and CO-series model range
- Rinses clean in seconds, per the listing
❌ Cons
- No 3.35 inch or 6-fin fit – count the fins on the old blade first
- The listing says avoid warm liquids and never run it empty
Current Price: $14.99
3. Replacement Lid for Ninja 72 Oz Wide PitcherHighest rated here (5.0, 43 ratings)Sponsored
The lid is the cheapest failure on a full-size Ninja: it splits at the pour spout, or the centre cap stops popping off, and the whole pitcher becomes a splash risk. This replacement is moulded for the newer 72 oz wide pitcher with the rim extension and lists BL770, BL770W, BL771, BL771C, BL772, BL772Q and BL773CCO as fits.
Food-grade plastic, dishwasher safe, and the listing describes the seating trick that stops leaks: set the lid down without pressure, turn it slightly counterclockwise until it clicks, then tighten. It is worth doing deliberately the first time instead of forcing it. The 5.0-star average sits on 43 ratings, so treat it as a small sample rather than a wall of proof.
Owners of a BL770-family machine with a chipped or warped 72 oz lid.
✅ Pros
- Replaces the single part most often cracked or lost
- Dishwasher safe
- Exact rim-extension fit rather than a stretch-to-fit mould
❌ Cons
- Only fits the newer rim-extension pitcher
- 43 ratings behind the 5.0 average
Current Price: $17.90
4. Blade Assembly for 72 Oz Ninja PitcherThe 72 oz pitcher-side bladeSponsored
This is the pitcher-side counterpart to the cup blade: six stainless cutting edges on the assembly that screws into a 72 oz jar. The listing describes it as built like the factory part so it locks in the same way, and it names BC701CCO plus the BL610, BL660, BL661BBYC, BL663, BL665Q and BL710WM families.
It is specified for bases between 1000 and 1500 watts, which is the practical limit most people need to check. The listing calls out washing and drying the blade right after use – a stainless assembly that sits in a sink of water is the one way to shorten its life – while also stating it is dishwasher safe. At 4.5 stars across 121 ratings it is the second-most-evidenced part here.
Anyone with a full-size pitcher that leaks at the base or has lost its edge on ice.
✅ Pros
- Six blades for ice and thick blends
- Locks into the pitcher like the original part
- Names BL610, BL660, BL663, BL665Q and BL710WM on the listing
❌ Cons
- Pitcher-specific – not for the single-serve cups
- Specified only for 1000 to 1500 watt bases
Current Price: $18.99
A Blender Usually Dies at the Seal, Not the Motor
Almost nobody throws out a blender because the motor gave up. They throw it out because the cup cracked, the blade assembly leaked, the lid split down the pour spout, or the pitcher stopped locking onto the base. Every one of those is a part, and on a Ninja the part costs less than a takeaway coffee.
That is the argument for keeping the right replacement on hand instead of buying a second machine. A 72 oz pitcher blade that locks in like the factory part is $18.99. A new blender that does the same job starts several times that. The catch is fit: Ninja has shipped bases with a 3.35 inch and a 4 inch blade diameter, 6-fin and 7-fin blades, and old and new 72 oz pitchers with different rim shapes. Buy the wrong one and it simply will not seat.
The Three Fit Checks That Save You a Return
Three measurements settle almost every replacement-parts argument before you order. Take them with the old part in your hand rather than from memory, because two Ninjas that look identical on the counter can carry different blade diameters inside.
The four parts below each publish their model list on the listing, which is exactly what you want before ordering. Where the listing gives a model range, we repeat it instead of guessing that your machine is close enough.
- Blade base diameter: 4 inches (10 cm) is the single-serve cup family; a 3.35 inch base is not in it.
- Fin count: count the raised cutting fins on the old blade. A 7-fin part does not replace a 6-fin housing.
- Pitcher rim: the newer 72 oz pitcher has a rim extension and needs the lid moulded for it.
Tip: Before ordering any replacement part, unscrew the old blade from an empty container and photograph it next to a ruler. Comparing a photo to the listing’s fit table beats remembering a model number.
How We Picked These Four
Every part here is an Amazon Creator Connections listing, which means the brand pays us a commission when you buy through the link on this page. We kept the placements visible rather than burying them, and the Sponsored label appears on each one.
We then applied the same two filters we use everywhere: a 4.0-star floor on the live listing, and a fit list specific enough to check against your machine. The rating counts below run from 43 to 2,900, so read the thin ones as early evidence rather than as proof.
The Four Replacement Parts Compared
Prices, star ratings and review counts below come from the live Amazon listings read on 2026-10-16, and match the campaign page checked the same day.
| Model | Price | Rating | Ratings Count |
|---|---|---|---|
| 18 Oz Replacement Cups for Ninja Blender, 2 Pack, Twist-On Design | $21.25 | 4.6 | 2,900 |
| 7-Fin Blender Blade Replacement for Ninja, 4" Base, 18/24/32oz Cups | $14.99 | 4.2 | 155 |
| Replacement Lid for Ninja Blender, 72 Oz Wide Jar Compatible | $17.90 | 5.0 | 43 |
| Blender Blade Replacement for 72 Oz Pitcher, Stainless Steel | $18.99 | 4.5 | 121 |
How to Seat a Replacement Blade Without Leaks
Put the blade assembly into the empty container first, before any liquid, and screw it down on a flat surface until the collar seats evenly. Cross-threading on a dry cup is obvious; cross-threading on a full one is a puddle on the counter. Then run it with warm water and a drop of soap for ten seconds as a test before the first real blend.
Do not run a new blade empty. The listing on the 7-fin blade says the same thing, and it is the fastest way to burn the seal: an unloaded spinning blade heats the gasket against the plastic collar. Short pulses with liquid in the cup is the habit that keeps a replacement lasting like the original.
When a Replacement Part Is Not Worth Buying
If the base housing itself is cracked, or the drive coupling on the motor shaft has stripped, a container part will not fix it. Those failures show up as the blade spinning while the pitcher stays still, or as a machine that starts and stops on its own. At that point the repair is the blender.
The other unbuyable case is a model outside the listed watt or diameter ranges. A 3.35 inch base does not take a 4 inch blade, and an old-rim 72 oz pitcher does not take the new lid. When the fit list does not name your model, believe the list rather than the photo.
Frequently Asked Questions
Do Ninja blender replacement cups fit all Ninja models?
No. The 18 oz cups in this guide are sized for bases with a 4 inch (10 cm) blade diameter, and the listing names BL450, 455, 456, 480D, NN100, NN101, BL910, SS101 and SS151. A 3.35 inch base will not take them, which is why the diameter check comes before the model check.
How do I know whether my blade is 6-fin or 7-fin?
Unscrew the assembly from an empty container and count the raised cutting fins pointing up from the base plate. Six and seven are not interchangeable, and the listing for the 7-fin blade here states plainly that it does not replace a 6-fin part.
Are these replacement parts dishwasher safe?
The 72 oz lid and the 72 oz pitcher blade are both listed as dishwasher safe, with the blade listing also asking for prompt washing and drying after use. The 7-fin cup blade is described as a quick rinse. Only those two listings state dishwasher safety, so hand wash the parts the listing says nothing about.
Why does my new blade leak and the old one did not?
Usually seating. Screw the assembly into a dry container on a flat surface, check the collar sits square, and run warm soapy water for a few seconds before the first blend. On the newer 72 oz pitcher the lid wants the same care: set it without pressure, turn slightly counterclockwise until it clicks, then tighten.
Is a replacement part cheaper than a new blender?
On these four listings, yes: the whole set costs $73.13 together, and any single part costs between $14.99 and $21.25. That only holds when the base and motor are healthy. A cracked housing or a stripped drive coupling is a blender problem, not a part problem.
Do these parts come with a guarantee?
The four listings quoted here describe fit, materials and care rather than publishing a written warranty term, so treat Amazon’s return window on your order as the protection. A part that does not match the listing’s model range is a return, not a repair, which is another reason to check the diameter and fin count first.
Ninja Blender Replacement Parts: The Final Verdict
If you can only buy one part, buy the one that failed, not the one that looks cheap. For single-serve machines the 18 oz cup set at $21.25 is the sensible spare because cups crack and drink lids go missing; for a full-size pitcher the $18.99 blade is the one that ends a leak.
Measure the blade base, count the fins, and look at the pitcher rim before you order anything on this page. Those three checks are the difference between a $15 repair and a $100 blender you did not need.
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As an Amazon Associate, The Spoonist earns from qualifying purchases. Product prices and availability are accurate as of the date/time indicated on Amazon and are subject to change.