The catch
Shark Navigator Lift-Away Self-Cleaning
You have to empty the cup.
Side by side
Go with the Shark ZU503AMZ for a self-cleaning main brush and bagless disposal, using stationary fabric tools. Go with the Kenmore BU4050 if self-sealing bags and an included rotating Pet HandiMate will serve you better. Both detach for hose cleaning, and neither hair feature on the main brush removes every maintenance task.
Before you buy
Main-brush hair management is available on both, which lets you pick the collection routine you prefer and keep that feature. The ZU503AMZ spares you dust-bag supplies, and the BU4050 spares you routinely opening a reusable cup.
Where this comes from
The exact manuals confirm automatic main-brush hair features on each model, along with different collection systems. Nothing is calculated about how long a bag lasts, total cost or dust exposure.
The catch
You have to empty the cup.
The catch
Compatible replacement bags must be on hand.


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Shark ZU503AMZ and Kenmore BU4050 compared on self-cleaning floor brushes, bagless versus bagged disposal and the included upholstery tools.
This one comes down to dirt collection and main-brush hair feature first, then to the limits of your own setup.
Which one fits
The ZU503AMZ pairs the self-cleaning floor brush with a reusable cup.
The BU4050 takes self-sealing bags.
Pet HandiMate comes with the BU4050. The Shark package lists stationary tools instead.
This workflow works on both. Neither one is identified as offering powered floor cleaning while detached.
In practice
Main-brush hair management is available on both, which lets you pick the collection routine you prefer and keep that feature. The ZU503AMZ spares you dust-bag supplies, and the BU4050 spares you routinely opening a reusable cup.
The exact manuals confirm automatic main-brush hair features on each model, along with different collection systems. Nothing is calculated about how long a bag lasts, total cost or dust exposure.
For fabric work, the BU4050's Pet HandiMate gives you a small rotating brush, whereas the Shark package supplies stationary tools. If that tool would be useful to you, the Kenmore package is the one to pick, though it can still need manual detangling.
What is in the selected boxes is not the same. The BU4050 guide clearly treats Pet HandiMate hair removal as separate from its Hair Eliminator floor nozzle.
The body comes apart for attachment work on both models, so neither clearly answers a need for a powered full-size head under a bed with the pod off. For that, look for a model with documented Powered Lift-Away.
The instructions for standard Lift-Away and Kenmore Lift-Up cover using hose tools. Neither exact model is shown here to have a powered nozzle in detached form.

Shark, ZU503AMZ
This Navigator brings a self-cleaning floor brushroll, and the pod still detaches for the supplied pet crevice and upholstery tools.

Kenmore, BU4050
This bagged Lift-Up upright has a floor brush that clears wrapped hair on its own. You also get button-release bags, a 30 ft cord and a separate brushroll stop.
Spec by spec
| Spec | Shark Navigator Lift-Away Self-Cleaning | Kenmore Intuition Hair Eliminator | In practice |
|---|---|---|---|
| Dirt collection | Bagless dust cup | Self-sealing replacement bag | Both handle main-brush hair, yet living with each one involves a different routine. |
| Main-brush hair feature | Self-cleaning brushroll | Hair Eliminator brushroll | Each documents automatic hair management, but no matched test compares them. |
| Selected fabric tools | Pet Crevice Tool and Upholstery Tool | Rotating Pet HandiMate plus other attachments | A separate rotating fabric brush comes with the Kenmore. |
| Detached cleaning | Standard Lift-Away for hose tools | Lift-Up for hose tools | Powered floor-head cleaning while detached is not shown for either model. |
| Remaining hair care | Persistent wrapped fibers can need manual removal | Pet HandiMate can need manual detangling | Look up what care is still left on each model, rather than assuming self-cleaning means no maintenance. |
Trade-offs
Change of plan
Go with Shark Navigator Lift-Away Self-Cleaning. The ZU503AMZ has a reusable cup and main-brush hair management.
Go with Kenmore Intuition Hair Eliminator. Self-sealing bags and Pet HandiMate come together on the BU4050.
Decision guide
Pick the Shark ZU503AMZ for a self-cleaning main brush with bagless disposal and stationary fabric tools. Pick the Kenmore BU4050 if self-sealing bags and an included rotating Pet HandiMate are worth more to you. Hose cleaning with a detached body is available on both, and neither main-brush hair feature gets rid of every maintenance task.
If buying bags is what you dislike, the ZU503AMZ lets you avoid it and still have a documented self-cleaning floor brush. If opening a dirt cup bothers you more, the BU4050 is the alternative. Those are different household preferences, and the sealed filtration and detachable pod that both share do not crown a universal winner.
The Pet Crevice Tool and Upholstery Tool from Shark are stationary attachments, whereas the Pet HandiMate from Kenmore has a rotating brush. If agitating fabric is why you are buying, that package difference counts. If a stationary tool already handles the surfaces you have in mind, you avoid putting that small rotating brush on your maintenance list.
According to the Shark manual, persistent wrapped fibers still have to be dealt with, and Kenmore gives separate cleaning instructions for Pet HandiMate. Both need checks for obstructions and filters. Compare which specific task each feature reduces, and keep the remaining care steps in your routine instead of expecting either system to clear every material by itself.
By the numbers
What we found across the upright vacuums we compare, plus the checked facts behind each finding.
| Product | Needs it meets | Facts we checked | Sources |
|---|---|---|---|
| Shark Navigator Lift-Away Self-Cleaning |
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| Kenmore Intuition Hair Eliminator |
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Ready to buy
Open either model on Amazon for the current price, customer reviews and delivery options.

You want the floor brush to manage hair and no replacement dust bags to buy.
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You like self-sealing bags for disposal.
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