Feb 25 around 4pm PT we were driving north on US Hwy 101 using the basic cruise control feature of our Model 3. Based on our settings I believe this would be considered adaptive cruise control, but I'm not sure. Enhanced Auto-Pilot was not in use. On a largely open highway, in particular with no one in front of us, and thankfully, no one close behind us, the car suddenly started to lose speed, not brake, just lose speed. I pressed the right-hand button on the steering wheel and called out "report bug" so there should be an incident record with Tesla I believe. After letting it slow a bit, I pressed the accelerator to resume and it resumed speed ok. I have used the "report bug" several times on this issue so there should be records of other incidents. Feb. 26, around noon. Traveling on Central Expwy at 55, the car suddenly slowed to about 25 in the space of a few seconds before re-accelerating. No visible object to cause this. Thankfully, no one behind me which is why I let it drop speed to see what it would do. Again, this was using CC, not EAP. This first happened on Jan 14, '22 using cc on s-bd US 101. I have video of this, but it's 19MB, so can't upload. I took to Tesla service and they concluded it was moisture obstructing camera view. Made no sense then as you would it expect to occur constantly, not intermittently. Presumably if this was a vacuum issue, they would have checked that. I think the 3 works CC by wire.
2017 Tesla Model 3: adaptive cruise control problems
5 of the 27 complaints about the 2017 Tesla Model 3 describe adaptive cruise control problems.
- owner complaints
- 5
- of this car's complaints
- 19%
- recalls
- 4
Adaptive cruise control problems by model year
What owners say
Experiencing unexpected braking on freeway while on cruise control. Car brakes for apparently no reason. There is no warning, vehicles in sight, on clear sunny day. Has braked up to 3 times/hr on two different days on road trip. No indicators say that anything is wrong with the car or its cameras. It is jarring and scary for both driver and passenger. Collecting info for Tesla service appt in August. Read info of phantom braking for newer Teslas. We drove this same route in this car in summer of 2019 and didn’t experience phantom braking.
Many phantom braking incidents both on autopilot and in adaptive cruise control mode result in surprising (and frightening) sudden braking for no reason. In high traffic conditions, this could lead to a possible rear-end collision. The adaptive cruise control has become so unstable in the last few months we will not use it. As this is a mature feature that used to work nearly flawlessly this is very frustrating to go backwards with an update.
On August 9th, 2021 I was traveling on Interstate 40, in NC, at MM 103 at approximately 70 mph. when with no warning the Main Control Unit (MCU) went blank. Adaptive Cruise control, speedometer were not operable or could not be seen. The MCU reset after a brief (5 second) pause. I immediately placed a service request for August 25th with Tesla. Tesla updated the firmware and performed standard maintenance on August 25th. See attached screenshots. On October 26th, at approximately 505 in the afternoon, I was traveling on I-40, in NC, at 70 mph when again the MCU went out but did not reset itself and remaind blank for the remainder of my trip, approximately 20 minutes. During this time adaptive cruise control, speedometer, turn signals, wipers and lane assit features were inoperable. I was able to complete my travel that afternoon in the car. On October 28th, I placed a service request for November 9th, with Tesla and shared the video I had of the incident. Tesla investigation into the incident indicated "We have concluded the investigation and found the crash (MCU) to be related to a current firmware bug that is known by our engineering team. We do not yet have a timeline when it will be fixed." This indiactes that Tesla knew of the issue with the firmware and has not resolved it. On Nov 2nd, 2021, Tesla cancled my November 9th, request for service due to software issue. I immediately reopened the claim, requesting the MCU be replaced and the newest version of software and driver safety features be installed I have not heard from Tesla about a resolution.
Shortly after purchasing the car it received a software download called emergency lane departure avoidance which is tesla's fancy name for a lane departure warning system. I have taken the car into their service centers 3 times to have it repaired because it only works <50% of the time - never works during rain, shadows on the road, and various other normal road & weather conditions. Each time I get the car back from the service centers I'm informed that that system is working normally. In late june of 2020 I purchased their basic auto-pilot software system for $2,170 which is a combination of both lane keeping assistance (tesla's self steering) and adaptive cruise control (tesla's traffic & road aware cruise control). This software has had "glitches" and malfunctions ever since the purchase. I contacted marie moore (assistant manager at tesla's bellevue, wa) about the issues and I was told that this software was a "self leaning" type and would improve with use. The first issue was the while driving on the freeway with auto-pilot engaged the car would veer right a few to several feet toward most on & off ramps un-nerving myself & passengers as well as getting close traffic upset enough that I would get honked at or worse. It gradually got better so that it would only veer right significantly less. However on 4/19 my car received a new software download that stated it would improve the auto-pilot & cold weather performance. I drove the car on a 140 mile freeway trip only to discover that the car would radically veer right on ~90% of all on ramps! Twice it nearly jerked the steering wheel from my grip and attempted to steer completely off the freeway & onto the on ramp. I made an appointment at the lynnwood, wa service center on 4/26 and was told once again that the car was performing normally & there was nothing they could do; & same with cruise control issues
Service bulletins that may apply
Related recalls
Back over prevention: software
- What is wrong
- Tesla, Inc. (Tesla) is recalling certain 2017, 2021-2023 Model 3, 2020-2023 Model Y, 2021-2023 Model S, and Model X vehicles operating software version 2026.8.6. The rearview camera image may be delayed when the vehicle is placed in reverse. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 111, "Rear Visibility."
- Risk
- A delayed rearview image reduces the driver's view behind the vehicle, increasing the risk of a crash.
- Remedy
- Tesla has released an over-the-air (OTA) software update, free of charge. Owner notification letters were mailed July 3, 2026. Owners may contact Tesla customer service at 1‑877‑798‑3752. Tesla's number for this recall is SB-26-00-001.
Recall number 26V283000 · Recall details
Back over prevention: display function
- What is wrong
- Tesla, Inc. (Tesla) is recalling certain 2018-2019 Model S, Model X, and 2017-2020 Model 3 vehicles equipped with Autopilot Computer 2.5 and operating certain firmware releases. The rearview image may not immediately display when the vehicle begins to reverse. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 111, "Rear Visibility."
- Risk
- A delayed rearview camera image reduces the driver's rear view, increasing the risk of a crash.
- Remedy
- Tesla will perform an over-the-air (OTA) software update, free of charge. Owner notification letters were mailed May 17, 2022. Owners may contact Tesla customer service at 1‑877‑798‑3752. Tesla's number for this recall is SB-22-00-004.
Recall number 22V169000 · Recall details
Forward collision avoidance: warnings: external/pedestrian alert
- What is wrong
- Tesla, Inc. (Tesla) is recalling certain 2020-2022 Model S, Model X, Model Y, and 2017-2022 Model 3 vehicles. The Boombox function allows sounds to be played through an external speaker while the vehicle is in motion, which may obscure the Pedestrian Warning System (PWS) sounds. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 141, "Minimum Sound Requirements for Hybrid and Electric Vehicles."
- Risk
- Pedestrians may be unaware of an approaching vehicle if the PWS sounds are obscured, increasing the risk of a crash.
- Remedy
- Tesla will perform an over-the-air (OTA) software update that will disable the Boombox functionality when the vehicle is in Drive, Neutral and Reverse modes, free of charge. Owner notification letters are expected to be mailed April 5, 2022. Owners may contact Tesla customer service at 1‑877‑798‑3752. Tesla's number for this recall is SB-22-00-003. Note: This recall has been superseded by Recall 22V‑235. Tesla's number for the new recall is SB-22-00-003.
Recall number 22V063000 · Recall details
Forward collision avoidance: sensing system: camera
- What is wrong
- Tesla, Inc. (Tesla) is recalling certain 2017-2021 Model S, Model 3, Model X, and 2020-2021 Model Y vehicles operating software version 2021.36.5.2. A communication error may cause false forward-collision warning (FCW) or unexpected activation of the automatic emergency brake (AEB) system.
- Risk
- Unexpected activation of the AEB system may cause the car to stop suddenly, increasing the risk of a crash.
- Remedy
- Tesla Service has released an over-the-air (OTA) software update, free of charge. The recall began October 25, 2021. Owners may contact Tesla customer service at 1‑877‑798‑3752. Tesla's number for this recall is SB-21-00-004.
Recall number 21V846000 · Recall details
Questions about the 2017 Tesla Model 3 adaptive cruise
Is adaptive cruise control problems a common problem on the 2017 Tesla Model 3?
5 of 27 owner complaints about the 2017 Tesla Model 3 (19%) mention adaptive cruise control problems. The model year with the most reports is 2022.
Is there a recall or service bulletin for this on the 2017 Tesla Model 3?
There are 4 recalls and 2 service bulletins for the same area of the car. Check them below with your VIN.
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