Likes the K400 a lot, very powerful, but after about a year it started leaking brown fluid at the bottom. Support replaced it without hassle.
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24signal
27reviews9%18% Mixed73% Negative
Reliability is the story with the KitchenAid K400 Blender: most owners report the jar leaking from the base, a failing bearing, grease or rusty residue, and a growing noise, often within a year or two.
What owners love, and what they don’tWhat owners noticed
Owner reviews (27)
Add your reviewShowing 23 reviews mentioning broke down Show all
K400 KSB4027 broke after one year and KitchenAid support wanted receipt and video; replacement jars are out of stock or over $115.
The bearing in their original K400 failed and the factory-refurbished Pro-line replacement failed in three years; new jars cost over $200. Calls it designed to fail after the warranty.
Loves the K400, but the blade is getting loose, it no longer blends properly and is noisy; cannot find a spare blade, only the whole bowl.
Bought a used K400 that works but makes a bad bearing-like noise and leaks rusty water into the base and jug.
Fourth KitchenAid blender: two have smoked while blending about 48 oz in the 56 oz pitcher, and support advised only half-filling. Heavily plastic and not as heavy-duty as expected.
On their third plastic jar because the blade bearing leaks black smelly grease after about six months; cannot get more than 12 months out of the K400 whereas their no-name blender lasted 20 years.
Their K400 glass jug failed with grease at the base and a screaming bearing; warranty is pointless as the glass jug was unavailable, so they rebuilt the jar with a new bearing.
The glass pitcher on their K400 started making a friction noise, black plastic bits broke off and the blades wobbled. The replacement pitcher refuses to turn on the blender.
Two KitchenAid blenders in a row (a diamond and a Proline K400) had blade bearings that went loose and noisy and leaked rusty residue on the motor. The jar cannot be repaired, only replaced for about $300, and the blade could detach.
K400 leaked out of the box but re-seating the rubber ring between the plastic base and the glass jar stopped it, even after making smoothies.
Bought the K400 in a limited colour; the glass jug leaked from the bottom within two weeks, and the replacement unit leaked too.
Same issue on their K400: rusty liquid pours from the jar and has oxidized the motor, so the fix is a motor replacement.
Their K400 jug failed out of warranty; KitchenAid sent a whole new blender, and its jug failed catastrophically on first use, so they sent another.
K400 series KSB4028: noticed a bad smell and found the jar bearing dripping green smelly grease, with a lot of play in the blade assembly.
K400 leaked straight away, and the replacement also leaked, so they sent it back and bought a Vitamix E310 instead.
Their K400 from the .nl webshop arrived leaking, after their old KitchenAid blender lasted two decades.
K400 straight out of the box leaked, and the replacement leaked too. KitchenAid's own support advised a refund because of production issues; they bought another brand that just works.
New K400 jug started leaking on first use; RMA brought a new jug that did not leak.
K400 jug failed after about a year, was replaced, and the replacement failed the same way with unbearable noise and grease, now rusted spindle. Calls it design flawed.
Loved the K400 KSB4027 for several years until the blade assembly disintegrated with plastic and smoke; replacement jars are back-ordered everywhere.
Second K400: the first was replaced in 2021, and a year later the second one is leaking grease and loud again; support replaced it again.
K400 got so loud it hurt their ears and left brown metallic goo after blending; suspects a failed seal and bearing.
Common questions about KitchenAid K400 Blender
What do owners say about KitchenAid K400 Blender?
Reliability is the story with the KitchenAid K400 Blender: most owners report the jar leaking from the base, a failing bearing, grease or rusty residue, and a growing noise, often within a year or two. Replacements sometimes failed the same way, and spare jars are costly or hard to find. It is powerful while it works.
Is KitchenAid K400 Blender worth it?
Of the 22 reviews with a clear verdict, 9% are positive, 18% mixed and 73% negative. The praise mentioned most is powerful. The most common complaint is broke down.
What do people like about KitchenAid K400 Blender?
The praise reviewers mention most: powerful (2 reviews) and solid build (1 review).
What are the most common complaints about KitchenAid K400 Blender?
The complaints reviewers mention most: broke down (19 reviews), loud (4 reviews) and overpriced (2 reviews). For example: Bought a used K400 that works but makes a bad bearing-like noise and leaks rusty water into the base and jug.
What does the signal score of 24 mean?
It's how well reviewed KitchenAid K400 Blender is, out of 100, next to the other blenders here. Two things go in: how its reviews compare with the best-reviewed appliance (positive reviews, mixed counting half, and how many reviews there are), and its own negative and mixed reviews, which take points off, so only a appliance few people are unhappy with scores in the high 90s. It's worked out from reviews only, needs at least 5 of them, and updates as new ones come in.
What are the specs of KitchenAid K400 Blender?
Category: Blender. Type: Full-size blender. Capacity: 1.4 L. Model number: 5KSB4026. Power: 1200 W.
Where do these KitchenAid K400 Blender reviews come from?
27 are quotes from Reddit, each linked to the original. Owner reviews are checked for spam before they appear. Every review, written here or quoted, is read as positive, mixed or negative.
