How much would it cost us to replace?

[Sitifan]

How much would it cost us to replace?
The above sentence is quoted from a dictionary. There is no context.
Since "replace" is a transitive verb, it should have an object. But where is the object?
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Thank you very much for your reply.

[Mister Micawber]

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We must presume that the object lies in previous context:

'I just broke my computer. How much would it cost to replace?'
.
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Native English teacher at Mister Micawber's

[Sitifan]

Can I say:
How much would the tire cost us to replace?
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Thank you very much for your reply.