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3 of 4 Brake lines failed within last 12 months

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Since last April I have had to replace 3 of 4 brake lines (attaching to brake) in my 2016 MKX.  In all the years of driving I have never owned a vehicle that I have replaced one of my brake line unless the vehicle was quite a bit older. The first brake line that failed was in April 2019. I took vehicle to dealer thinking it might be covered under the extended warranty or maybe a TSB or recall, but it was not.  Then I replaced the next one in June 2019, and the last one this week at a near by auto shop.  As a precaution I had the mechanic replace the 4th line because if the other 3 had failed,  I figured it would only be a matter of time before the 4th line would failed.  The one thing I did this last time I had the mechanic save the old lines.

 

Has anyone else had this issue with their MKX? 

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Since I also own a 2016 MKX (with only ~ 35K miles), your post caught my attention as a DIY maintenance owner (minor routine services, e.g. oil changes, fluid & belt checks, etc.).  It would have been helpful if you would have identified the cause that necessitated the brake line replacements. A check of the NHSTA website indicated a few MKX owners reporting brake line issues including corrosion, split lines, and leaking master cylinders. The latter can result in low fluid levels that result in interior line corrosion; exterior line corrosion can be caused by environmental conditions, e.g. road chemicals or coastal salt air, and splitting can be caused by elevated levels of water in the lines (from high ambient humidity conditions) that freeze in winter temps.

 

There does not appear to be an unusual occurrence of brake line failures at a national level.

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On 2/18/2020 at 9:03 PM, Cosmos36 said:

Since I also own a 2016 MKX (with only ~ 35K miles), your post caught my attention as a DIY maintenance owner (minor routine services, e.g. oil changes, fluid & belt checks, etc.).  It would have been helpful if you would have identified the cause that necessitated the brake line replacements. A check of the NHSTA website indicated a few MKX owners reporting brake line issues including corrosion, split lines, and leaking master cylinders. The latter can result in low fluid levels that result in interior line corrosion; exterior line corrosion can be caused by environmental conditions, e.g. road chemicals or coastal salt air, and splitting can be caused by elevated levels of water in the lines (from high ambient humidity conditions) that freeze in winter temps.

 

There does not appear to be an unusual occurrence of brake line failures at a national level.

Cosmos,

 

So for some detail, I have about 91K on the MKX.  As for as far as environment, I am in the St Louis area, we get some snow, but really not that much as compared to up north.

As for the Brake line, it is the part number BRHF213 an what is happening there is a break in the hydraulic line under the shield that I circled in red. Each time it happened the mechanic reported brake fluid coming out from the end of that shield hose. The is nothing as far as leading events, fluid levels were normal, I have the dealer change my oil every time and the do a "21 point inspection" or something like that, so if there was tail tail signs I think they would have flagged it. When it happens it is all the sudden as I am driving and try to brake and then my foot goes all the way to the floor with a minimum of braking happening.  The first time it happened I was on the freeway heading home from work going 60+ mph, liked to scared the **** out of me. But I was able to get the vehicle stopped, the second and third time is was in a parking lot going into a parking place, but I could tell immediately what was going on, and grabbed the e-brake as a back up. As for the temp, the first was in April (60+f), the second in June (70-80) and last Saturday is was in the 40's.

 

Oh  what topped it off, yesterday after work as I was walking out to my vehicle I just happen to look down at on of my rear wheels (where lines were replaced) and here was one of my lug nuts half the way off.  Stupid mechanic did not torque down any of the lug nuts in the rear, I am lucky they did not come off since I drive about 25 miles each way to and from work. So I had driven on the vehicle for 75 miles at least before I discovered the issue. I am going back to the shop and talk to the store manager.... A little ticked to say the least.

 

 

brake.png

 

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Punch...thanks for adding the details & photo. So, it was the flex rubber connectors, not the steel lines where the failures occurred. Good to know.

It has been many decades since I experienced a total 'pedal-to-the-floorboard' brake loss...very frightening.

"Stupid mechanic" indeed! You were fortunate to have avoided a fatal incident.

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Good catch, pmonag. The news has been out for nearly a month...you're the first to report it here.

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I had seen the report when it first came out a month or so ago. 

Which prompted me to go find all my receipts. Now I need to go buy the dealer to see how to make a claim for the lines I have already replaced.

Also if you notice the recall is only the front brake lines but after I had first my front two line break, then one of my back lines failed (this thread), that is when I had the shop (not dealer) replace both the broken rear line  and the rear line that was sure to fail shortly.

I am sure Ford is going to not want to do it, we will see, maybe I will get lucky...

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