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2019 Sport with eyesight (CVT)
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Discussion Starter · #1 ·
Hi!

I’m trying to understand if this is normal wear in my case or lack of execution when servicing them. Full disclosure – I strictly follow maintenance schedule, but not DIY at all except air filters and winter tires.

So the full story of my breaks is as follows, car is delivered new in Aug 2018 :
1st brakes service Aug 2019 / 14000km at the dealer
2nd brakes service Nov 2020 / 25000km in independent shop, known as local Subie specialists, nice reviews, recommended by a colleague at work
3rd brakes service and brakes fluid flush Sept 2021 / 32000km the same independent shop
At this service I’ve got a call from shop, telling me they suggest to replace front rotors. While front pads are still fine, they said rotors are rusty and would cause vibration otherwise. No additional charges for labor since brakes already serviced. Just parts, 2 rotors 110 CAD each. I said yes, but keep parts. Also, with fluid flush they created intermittent problem when red light of hand brake would come up for a split second after braking on uneven road. Needed to come back to rectify which they did in 10 min, apparently not enough fluid.

Here are both rotors.
Automotive tire Wood Tread Rim Gas

Automotive tire Wood Tread Rim Gas


So I am trying to understand if this is

A: normal wear for a Crosstrek taking into account previous 2 services OR
B: lack of execution OR
C: unnecessary change altogether.

Basically I’m weighing if I should trust this independent shop with my car again.

Thanks for your feedback!
 

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2020 Crosstrek Limited
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858 Posts
The rotors look normal for three Canadian winters. The rust does not look excessive and the condition of the rotors looks good.
I think that the shop just wanted to upsell you.

The only thing that might be wrong with the rotors is that- IF they had been turned at each service, they may be too thin now- but that’s impossible for me to determine from the pictures.
 

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2019 Sport with eyesight (CVT)
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Discussion Starter · #3 ·
The rotors look normal for three Canadian winters. The rust does not look excessive and the condition of the rotors looks good.
I think that the shop just wanted to upsell you.

The only thing that might be wrong with the rotors is that- IF they had been turned at each service, they may be too thin now- but that’s impossible for me to determine from the pictures.
One is 24.36mm , another 24.52mm , if this is how to measure:
Calipers Wood Automotive tire Sleeve Font

Automotive tire Tire Wood Tread Font
 

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2019 Subaru Crosstrek Limited
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Your rotors look pretty normal to me. I have about 34,000km on my original set and haven't replaced them yet. I think driving patterns go hand in hand with how long your brakes will last.

I think you could've gone a bit more before needing to replace your brakes. Did you put new OEM rotors and pads?
 

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2020 Crosstrek Limited
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One is 24.36mm , another 24.52mm , if this is how to measure:
You are probably also measuring the edge of the rotor that gets no wear from the pads, so, likely you are measuring more thickness than actual.
It used to be that rotor manufacturers would imprint/stamp the minimum thickness allowed onto the rotor. I do not know the minimum thickness of the rotor that Subaru specifies; if it is not shown on the rotor, the best that you could do is to compare it to the new rotors that they sold to you.
 

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2019 Canadian Sport trim (6MT // 2.0 )
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Do you park your car outside or in a garage? Makes a difference when it comes to rust.
Nevertheless, 3 wibters seems close to the longest that brakes last in Canada, regardless of the mileage. What hit me in your narrative is that you never specified having issues with your brakes, instead they were deemed as replacable because they would cause vibrations.

My past Impreza brakes lasted ~60 000 km ish per set, roughly 2.5-3 years (with annual cleaning, lubricating, etc). Maybe you could have pulled another season from them...
 

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2019 Sport with eyesight (CVT)
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Discussion Starter · #7 ·
You are probably also measuring the edge of the rotor that gets no wear from the pads, so, likely you are measuring more thickness than actual.
It used to be that rotor manufacturers would imprint/stamp the minimum thickness allowed onto the rotor. I do not know the minimum thickness of the rotor that Subaru specifies; if it is not shown on the rotor, the best that you could do is to compare it to the new rotors that they sold to you.
Thanks for your replies and analysis sas-XV, marking MIN.TH.22 MM on rear inner circle. I've measured again without edge. My caliper has two trimmings just for that. I can't get less than 23.94 mm. So it's not wear for sure.
 

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shops replace rotors when they replace pads. that's what they do
But they didn't replace the pads: "front pads are still fine"
You are correct. The next visit when they need new pads, those like-new rotors are going in the bin for a new set (again).
OP: I have also done 3 Canadian winters and my rotors look +/- the same - actually look a bit better than mine. I've greased my slide pins every year but otherwise done 0 maintenance. My brakes are quiet and work flawlessly.
 

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Subaru Crosstrek XV 2015
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Both need to be done at the same time, the pads or the rotors wears will have different angles or grooves. If you put a new rotor in, the pad it's worn in a weird shape - you will cause the rotor to wear uneven and make the braking even worst.

The OEM pads are much smaller than aftermarket. So if you replace only the pads, the aftermarket pad will start to wear out from the rotor rust lip since the original OEM pad surface is smaller.
 

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But they didn't replace the pads: "front pads are still fine"
You are correct. The next visit when they need new pads, those like-new rotors are going in the bin for a new set (again).
OP: I have also done 3 Canadian winters and my rotors look +/- the same - actually look a bit better than mine. I've greased my slide pins every year but otherwise done 0 maintenance. My brakes are quiet and work flawlessly.
never heard of that. i have my pads and rotors replaced at the same time. 50k miles for the rears. 60k miles for the fronts
 

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2019 Canadian Sport trim (6MT // 2.0 )
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Wanna see my 120,000 kms original rotor after 5 winters?
Damn! Was never able to pull 5 years out of my brakes.


Does parking your car in a garage make a difference when it comes to rust? What about washing the car more often in the wintertime?
It does, for two reasons. A heated garage will cause the salty slush to melt, and creep its way everywhere, more so than if it's just packed snow remaiming frozen for weeks or months. Secondly, heat accelerates oxidation - so once the parts are covered with salt, rust will progress much faster.
 

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2019 Subaru Crosstrek Limited
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That's a good point you mentioned about a heated garage. My garage isn't heated but I try to wash the car as often as I can during the wintertime to keep the salt to a minimum.
 

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What kind of driving pattern do you have? Mainly highway driving? Quite a long time to drive 120,000 on an original set.
Mine fronts lasted almost the same in a high salt environment. Still had life but I had eveything apart at the time so replaced them. The rears went about 40,000 ish. Pads actually fell apart.
 

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Mine fronts lasted almost the same in a high salt environment. Still had life but I had eveything apart at the time so replaced them. The rears went about 40,000 ish. Pads actually fell apart.
That's kinda pushing it if your pads fell apart. From my experience, the rears tend to go first but everyone has a different situation. I guess if you do mostly city driving you might need to replace them sooner.
 

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The rears fell apart. There was plenty of pad left, they just failed. Never had that before ever with brakes. But yes, replaced the rear 3 times to the fronts 1. No big city driving, mostly country roads and small towns.
 
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