If your Hilti rotary hammer is starting to spark or losing power, it might just need new brushes.

These are a set of carbon brushes made by CSS, and they're designed to fit a bunch of popular Hilti models.
We're talking the TE14, TE15, TE15C (the 110V version), TE24, and TE35.
The manufacturer part number is D41, which is a pretty common one.
They're intended as a direct replacement part, so if your old brushes are worn down, these should slide right in.

They're brand new and ready to go.
It's one of those simple fixes that can bring a well-used tool back to life.
Brushes are a normal wear item, so having a spare set on hand is never a bad idea.

These CSS ones are made to work with tools from all manufacturers, but specifically for these Hilti models.

They're part of the cooling and heating system of the motor, so they're important for keeping things running smoothly.
Don't toss an otherwise good hammer drill just because the brushes are shot—swap these in and get back to work.
It's a cheap fix that can save you a lot of money.

Just double-check that your model is on the list: TE14, TE15, TE15C (110V), TE24, or TE35.

It's a simple, practical replacement part.