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Tesla Model S Drive Unit Replacement by the Numbers

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During my early days of researching the Tesla Model S, I had concerns about a number of things that were emerging in the press. Fires, Model S drive unit issues, and handling in the snow. Tesla quickly addressed the “firegate” issue by retrofitting the Model S with a titanium shield. My concerns around winter driving, in particular handling in the snow, also became a non-issue after watching several winter driving videos put together by Bjørn Nyland.

Within no time, I became a new Model S owner and quickly learned that driving in the winter could actually be quite fun with a good set of winter tires. Tesla later introduced the all-wheel drive “D” models putting to rest any remaining doubt that the Model S could be the best and safest handling car in the world.

But one question still remains for me, Has Tesla dealt with the Drive Unit issues?

Model S Drive Unit Replacement by the Numbers

There is a group of Model S owners across the forums, but also validated by major publications such as Edmunds, that have had one or more drive unit replacements.

Early reports of drive unit issues ranged from total failures that left the Model S inoperable, to more recent complaints of clunking and milling noises. Elon has said in the past that many of these pre-emptive drive unit replacements were unnecessary and a simple $0.50 shim was all that was really needed, yet Tesla Service centers have been proactively replacing drive units.

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The following polls from TMC show that a majority of Model S owners have had their drive units replaced.

Drive Unit Poll

While the poll only represents a small sample of Model S owners, one might draw significance in the numbers as the density circles around owners needing a drive unit replacement at relatively low mileage, and without any harsh driving prior to failure.

The polls also give insight to the motive behind each drive unit replacement.

Non replaced DUs

DU replacements by build date

 

Though it appears the issues mainly center around earlier versions of the Model S, there’s been reports of newer Model S with Autopilot hardware hearing milling noises coming from the drive unit. One viewer described the sound as “sawing wood”.

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Tesla’s Response to Drive Unit Issues

In typical Tesla fashion, the company acted fast to address the issues, and curb concerns by offering an unlimited mile/8 year warranty on the drive unit. I think this was a great response by Tesla which put to rest any concerns about the quality and long term durability of their drive units.

Elon is now talking about building a power train that will last a million miles and I believe Tesla continues to put significant energy into improving the drive units. Tesla continues to honor the warranty and is proactively replacing drive units that show early signs of problems.

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Tesla-Drive-Unit

 

My Experience

After 12 months of Model S ownership and 30k miles drive, I started hearing a humming noise from the rear of my Model S during highway cruising. The noise was unusual as I had gotten used to hearing only the noise of the tires and wind, but there was a new noise only noticeable when cruising or decelerating with regeneration at 65 MPH and over. The noise continued to become more audible over the next few months, but I learned to live with it and did not contact Tesla. My personal rule of thumb on noise related issues is to wait for passengers to comment on it first. It’s my self crazy check.

Two months after the original drive unit humming noises began, a higher pitched milling type noise started occuring when traveling at speeds of 20 MPH or less. The sound varied depending on how much power was being used. That’s when I reached out to Tesla.

Drive unit details

Tesla service record

 

Tesla service had me come in for a test drive which they can do on demand without you needing to wait. We drove about a block before the Tesla service technician said the drive unit needed to be replaced.

The explanation was that tolerances inside the drive unit have led to metal particles getting into the fluid around the drive unit, and as the concentration of particles increased, it caused the noise from the drive unit to become louder when under load. The new drive units evidently have better tolerances and are less prone to having metal particles being shaved off.

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At that time, Tesla service has been very backed up here in Massachusetts so my appointment for the drive unit replacement was scheduled six weeks out. I put on another 4,000 miles during that wait time, with an increasingly louder drive unit, before it was finally replaced.

When Tesla replaces a drive unit, they replace both the drive unit and inverter as you can see from a copy of the parts list. The last letter in the drive unit part number (“M” in my case) seems to indicate the generation of the drive unit. The later the letter the better, with the “Q”s seeming to have the best longevity according to the forums.

I’m happy to say that I’ve logged 8,000 miles of happy and noise-free driving after my drive unit replacement. The replacement was done recently so my guess is that I have a newer unit, and thus hope this will be my only replacement.

Thankfully for all of us, Tesla has a first class warranty and level of service. While it goes without saying that inconveniences such as this may happen, rest assured that Tesla has you covered and will always strive to make things right.

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"Rob's passion is technology and gadgets. An engineer by profession and an executive and founder at several high tech startups Rob has a unique view on technology and some strong opinions. When he's not writing about Tesla

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OPINION: Tesla Vandalism lawsuit should be the first of many

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Credit: CBS Colorado

The filing of a lawsuit by a Tesla owner who had his vehicle vandalized by a brainwashed member of what is being called the “Tesla Takeover” movement should be the first of many.

For the past few months, we have seen so many instances of intimidation by those who oppose Tesla, CEO Elon Musk, and President Donald Trump. These occurrences have been incredibly frequent and have varied in terms of their severity. It’s been as arbitrary as keying a car, and as violent as gunshots and Molotov cocktails being shot and thrown at showrooms.

The side of the perpetrators seems to be under the impression that President Trump and Musk are punishing those who have differing viewpoints as if their very livelihoods are under attack. The problem is, although government spending and some government programs are being modified or eliminated, there is no specific group being targeted, which is a big reason the use of the word “Nazi” has been baffling to me over the past few months.

That other side will have you believe there is a right-wing force that has taken over the government and aims to violate the rights of everyone who is unlike them. Ironically, it is precisely what the “protestors” are doing. Don’t agree with us? Okay. We’ll damage your vehicle.

Although the Trump administration and the FBI have set up specific measures to investigate instances of vandalism and hopefully eliminate it altogether, things have not truly calmed down. In fact, it seems it is getting worse.

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However, a lawsuit filed by a victim of one of these senseless attacks has set a new precedent: damage my car, you will find yourself in a lawsuit:

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In actuality, this might be the best strategy for minimizing the instances of vandalism we have seen over the past several months. Nothing seems to be working, and the attackers, who appear to be of all shapes, sizes, and ages, only seem to be doing it more often, despite being caught on camera by Sentry Mode.

The suit that was filed against Rafael Hernandez, who keyed a Model X at DFW Airport, seeks $1m in damages. While it is unlikely he will be awarded that significant sum, what Hernandez ends up paying could be significantly more than just the amount of repairing the scratch.

This all funnels down to one specific point: Tesla drivers are simply that, people who drove to buy and drive a Tesla. Driving a car is not a political statement; it is, in many ways, simply a choice of convenience. People choose EVs for many reasons, with home charging, performance, and look being several of them.

Ask 100 Tesla owners why they bought the car, and I’m sure many would not say, “Because I love Elon Musk and agree with everything that comes out of his mouth.”

I am an Elon Musk fan, but I don’t agree with everything he has done or will do. I don’t agree with everything my parents, my friends, or my family do. I am not a loyalist to anyone except myself. This is where I find the vandalism to be so distasteful.

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If Toyota’s CEO came out and said things that were controversial, for example, “We’re not transitioning to EVs because we don’t feel it’s the right time with demand,” something that was stated a few years ago as a part of their strategy, do you think Tesla owners were keying Toyotas? No.

Support brands that line up with your ideologies. Avoid ones that don’t. People of all ages do this peacefully. If you want to hurt a brand, don’t give them or their customers your money. Keying a Tesla might result in both with this initial lawsuit.

The point is, there is a right way and a wrong way to go about this. Vandalism is not the right way. Not only are you disrupting someone’s life who has nothing to do with Tesla, but now you’re putting yourself in the line of fire for a particularly substantial sum of money. Additionally, you’re not winning over any fans with this type of reaction. Nobody said “I now see their point since they keyed my car, I agree with them.”

I am hopeful that this lawsuit will encourage Tesla to go after the violent vandals who have attacked its stores. I am hopeful that this lawsuit will encourage Tesla owners to go after the violent vandals who have had their cars damaged by senseless people who have differing political views.

Perhaps this is the move that will start to bring down the frequency of these attacks.

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Tesla best-rated car brand in UK, beats Toyota in reliability: survey

The survey asked readers to rate their cars across metrics like efficiency, reliability, practicality, safety, comfort, and performance.

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Credit: Tesla China

Tesla critics would typically paint the company’s electric vehicles as reliability nightmares with subpar build quality and cheap materials. As per a survey from the U.K., however, the opposite is true, as Tesla is not just the country’s overall best-rated car brand, it is also the second most reliable carmaker.

The survey was conducted by HonestJohn.co.uk, which asked its readers to rate their cars across several metrics, such as efficiency, reliability, practicality, safety, comfort, and performance. Over 6,000 respondents participated in the recent survey.

UK’s Overall Best-Rated Car Brand

Based on the respondents of the Honest John Satisfaction Index survey, Tesla was the U.K.’s best-rated car brand for 2025 with a satisfaction index rating of 89.41%. In second place is Japanese premium carmaker Lexus, which garnered a satisfaction index rating of 86.32%. In third place is Porsche, which garnered a satisfaction index rating of 84.79%.

Tesla’s Reliability Surprise

While Tesla’s high customer satisfaction index scores in the survey were not that shocking, the company’s rankings in reliability are especially surprising. Tesla critics typically accuse Tesla of producing vehicles that are not reliable or are prone to imperfections like panel gaps. But as can be seen in the U.K. survey, Tesla’s reliability has actually improved a lot. 

Tesla’s reliability rating in the Honest John survey was an impressive 95.29%. That’s just below Lexus, which was the number one at 97.01%. Tesla was also above Toyota, which was in third place with a reliability rating of 94.65%.

What Honest John Says

In its rankings for the U.K.’s most reliable car brands, Honest John highlighted that while Tesla tended to be hit or miss with things like build quality in the past, the company has matured a lot in recent years. 

“While we were always impressed by the technology within Tesla’s range of exclusively electrically powered cars, build quality seemed to be a little hit and miss, to say the least. Evidently, matters have improved significantly in this regard according to our readers’ feedback as not only has the brand scored well for reliability across its four-strong range but the Tesla Model 3 was also rated as the most satisfying car to own overall,” the publication wrote. 

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Tesla Unveils Model Y RWD 110 customized for Singapore

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tesla-model-y-rwd-110-custom-singapore
(Credit: Tesla Singapore)

Tesla unveiled the Model Y RWD 110 for Singapore’s Category A certificate of entitlement (COE) rules. This custom SUV tweaks the updated Model Y, which was launched in Singapore in January.

Tesla tuned the Model 3 RWD 110 for Singapore before, and that customized version’s success spurred this Model Y adaptation. The Model Y RWD 110 runs at 110kW, down from 255kW in the standard RWD. It qualifies for Singapore’s Category A COE, unlike the Model Y 255kW version, which sits in Category B.

Category A COEs are for mass-market cars. They score lower premiums than Category B COEs. BMW and Mercedes-Benz register vehicles as Category A COEs in Singapore as well.

In Singapore, buyers need to pay the COE to register a car. The latest tender showed an SGD 22,388 gap between Category A and B premiums.

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The Model Y RWD 110’s road tax is significantly reduced from SGD 3,478 to SGD 1,562 yearly. The Strait Times calculated that the cheaper Model Y in Singapore would save SGD 19,160 over a 10-year COE.

The Model Y RWD 110 matches the 255kW version otherwise. The more affordable Model Y’s battery size holds steady. Its energy use, equipment, and design stay the same.

Tesla prices the Model Y RWD 110 at SGD 103,476 before COE. The Model Y RWD 110 costs SGD 3,026 less than the 255kW version, excluding COE costs. It uses a 62.5kWh lithium iron phosphate battery.

Tesla has released cheaper versions of its cars before. For instance, it rolled out a more affordable Model 3 in Mexico last year. The cheaper Tesla Model 3 in Mexico did not use the same materials and had different features to reduce costs.

Tesla might consider releasing custom, cheaper versions of its vehicles in other countries. Industry sources in China hint at a “lower-priced Model Y” for the Chinese auto market, which keeps the Juniper’s battery and chassis

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