Accumulator leak malfunction code C1391
Driver
Joined: Mar 2016
Posts: 61
Likes: 7
From: FL
The quote from Toyota was $5,200 for c1391 brake malfunction and front axle wheel bearing. I could get it fixed tomorrow but I'm buying a house & closing next week. So I have to wait. While I wait im trying to decide if I want to fix or just trade in for newer truck. 120,000 miles on ls460
Intermediate
Joined: Jan 2016
Posts: 454
Likes: 152
From: CA - Coachella Valley
The quote from Toyota was $5,200 for c1391 brake malfunction and front axle wheel bearing. I could get it fixed tomorrow but I'm buying a house & closing next week. So I have to wait. While I wait im trying to decide if I want to fix or just trade in for newer truck. 120,000 miles on ls460
If I was in your shoes & the repair cost is at least 1/2 of the value of your car, I would sell it.
My 2 cents.
His car is an '07. Low miles for the year. He posted an issue a couple years back. If he gets a second opinion from an Indie shop, the repairs may be much less ($2000-3000). Lexus tends to recommend replacing all the brake component in this situation where an Indie may not. Trade it in and he'll get very little. Do the repairs and a private party will want this low mile car if it looks good. Low mile LS are hard to find but there are buyers ready with cash. Even with the sales tax credit in FL, trading as is would be a big loss.
Pit Crew
Joined: May 2021
Posts: 122
Likes: 75
From: NV
After a brake fluid change/bleed (for my 2007 LS460) at the dealership my symptoms mostly disappeared ... but not entirely. The clunking when working the brake pedal all but stopped. In my case, the Brake System warning comes on occasionally. When it does, I stop and restart the car and the message is cleared. It happens mostly when I start driving on an incline, so I suspect 'tipping' the brake fluid is the aggravator. When I look in the reservoir it looks like they overfilled the fluid ... but I have left it be. If the problem worsens I will try the $1000-no-Techstream solution discussed here to see how that works out. Btw, my belief is that if the actuator fails, I won't actually entirely lose my brakes, but only power-assisted braking.
Last edited by DrQuality; Oct 7, 2023 at 10:52 PM.
Lexus Champion
Joined: Oct 2019
Posts: 18,096
Likes: 1,740
From: Ohio
Having driven 3 of these with total actuator failure I'll warn you right now that's it's near impossible to stop the car if it's going 30 mph with the emergency bypass. It's not like manual brakes or a normal system that looses the booster, it's more like trying to stop a full size truck with drums and only one working brake line to a rear brake.
Having driven 3 of these with total actuator failure I'll warn you right now that's it's near impossible to stop the car if it's going 30 mph with the emergency bypass. It's not like manual brakes or a normal system that looses the booster, it's more like trying to stop a full size truck with drums and only one working brake line to a rear brake.
ClubLexus Stories
Celebrating Lexus & Toyota from Around the Globe
8 Tips for Improving Your Hybrid or Plug-in Hybrid's Efficiency!
Michael S. Palmer
10 Best Lexus Models No One Remembers
Joe Kucinski
TRD Off-Road Premium: Best 2026 4Runner, Except This One Thing
Michael S. Palmer
Top 10 Lexus & Toyotas to Drive Before You Die!
Joe Kucinski
Top 10 Lexus/Toyotas With The LEAST 5-Year Depreciation
Joe Kucinski
Lexus LC500 Convertible Auction: A Preview of Rising Values?
Brett Foote
GX 550 vs TX 550: Best 3-Row Luxury Lexus Family Hauler
Michael S. Palmer
9 Best Lexus Models You Can Buy for Half Price (And 1 You Shouldn't!)
Joe Kucinski
2026 Lexus NX Buyer's Guide: Models, Features, Prices & More!
Brett Foote
Driver
Joined: Mar 2016
Posts: 61
Likes: 7
From: FL
I have been in contact with a local garage that will allow me to bring in the brake actuator assembly and they will put it in. This will save me $1,600 on the part. I just need to be sure that the garage has Techstream 2.0 or higher so that the brake lines can be bled correctly. With used car prices so high and rates up there it will be difficult for me to trade in for a newer vehicle. I love my LS but it seems to have expensive things go wrong.
Driver
Joined: Apr 2015
Posts: 61
Likes: 23
From: Alabama
I lucked up when my actuator started to fail. A Lexus dealership down in Mobile, AL had them on sale for like $950 so I ordered it and the local Toyota dealership put it on for me. I don't think they usually do that but since it was an OEM part I had they did. This was a couple of years age but they charged like $650 for labor.
Pit Crew
Joined: May 2021
Posts: 122
Likes: 75
From: NV
I have been in contact with a local garage that will allow me to bring in the brake actuator assembly and they will put it in. This will save me $1,600 on the part. I just need to be sure that the garage has Techstream 2.0 or higher so that the brake lines can be bled correctly. With used car prices so high and rates up there it will be difficult for me to trade in for a newer vehicle. I love my LS but it seems to have expensive things go wrong.
Driver
Joined: Mar 2016
Posts: 61
Likes: 7
From: FL
I found these two websites. I haven't ordered yet, im still trying to find a garage that will allow me to bring in the part and then install it.
https://parts.lexus.com/p/Lexus_2007...405050110.html
https://www.discountpartsmonster.com...5050110?c=az0x
https://parts.lexus.com/p/Lexus_2007...405050110.html
https://www.discountpartsmonster.com...5050110?c=az0x
Try Yelp and search for shops that specialize in Japanese cars. They'll have the proper training and software. If you allow the shop to supply the parts, there will/should be a full warranty. Not the case when you supply parts. Only you can decide if the $ savings is worth it.
Pit Crew
Joined: May 2021
Posts: 122
Likes: 75
From: NV
I found these two websites. I haven't ordered yet, im still trying to find a garage that will allow me to bring in the part and then install it. https://parts.lexus.com/p/Lexus_2007...405050110.html https://www.discountpartsmonster.com...5050110?c=az0x
Driver
Joined: Mar 2016
Posts: 61
Likes: 7
From: FL
Codes disappear while driving?
I have not driven my car for three weeks and I got in it today drove it 12 miles. after driving it 6 miles all the lights went off. the check engine, the ABS malfunction, the vehicle stability control, and !!! Warning light. My top speed during all 12 miles was 50 mph. what would make these codes disappear while driving? I have a video MP4 format on my iPhone, but I can’t post it. I actually have a video of them going off while I’m driving.
here’s video -
here’s video -
Last edited by dphennis; Oct 17, 2023 at 07:28 PM. Reason: Added video