What is a disadvantage of a smart car?

One significant disadvantage of a smart car is the heightened risk to privacy and cybersecurity: modern vehicles collect extensive data and stay connected to the internet, which can expose drivers to data sharing, tracking, or even hacking. More broadly, “smart” features can also introduce higher repair costs, software glitches, and dependence on connectivity. This article explains why privacy and security risks stand out, and outlines other drawbacks drivers should weigh before buying.

Why privacy and security risks stand out

Today’s connected cars act like rolling smartphones. They log location histories, driving behavior, infotainment usage, voice commands, and even biometrics in some models. That data can be shared with automakers, apps, data brokers, or insurers, depending on settings and agreements—sometimes in ways owners don’t expect. After investigations in 2024 spotlighted how driving behavior data flowed from vehicles to third parties that influenced insurance pricing, several automakers said they would curtail or pause certain data-sharing programs. But the broader ecosystem remains complex and opaque.

Cybersecurity is a parallel concern. Independent researchers in recent years have repeatedly demonstrated vulnerabilities in connected-car apps, telematics portals, and vehicle APIs that, if exploited, could allow unauthorized access to locks, ignition, or personal data. While automakers patch issues and regulators now scrutinize software safety more closely, the attack surface grows as vehicles add connectivity, sensors, and over-the-air (OTA) updates. High-profile software recalls delivered via OTA across multiple brands underscore that bugs in code can carry real-world safety implications.

Other notable disadvantages beyond privacy

While privacy and security are the most consequential for many buyers, several practical downsides regularly surface in ownership surveys and repair data. The following list highlights common trade-offs that come with advanced connectivity and automation.

• Higher repair and calibration costs: Replacing a windshield or bumper can require camera/radar recalibration for ADAS features, adding hundreds of dollars to routine repairs.
• Software glitches and feature instability: Infotainment freezes, sensor misreads, and buggy driver-assistance behavior can degrade the experience until patches arrive.
• Dependence on connectivity and cloud services: Navigation, voice assistants, remote start, and app-based keys may fail during outages or in areas with poor signal.
• Rapid tech obsolescence: Hardware and software evolve quickly, which can limit the useful life of older systems and weigh on resale value.
• Subscription creep and paywalled features: Some brands tie convenience or performance features to ongoing fees, increasing long-term costs.
• Insurance implications: Telematics programs and shared vehicle data can influence premiums; opting out may limit discounts, opting in may raise costs after an event.
• Driver overreliance on assists: Advanced driver-assistance systems can reduce vigilance if drivers assume capabilities that the system does not have.
• Environmental and end-of-life concerns: Bigger batteries and more electronics complicate repairs and recycling, even as tailpipe emissions fall in EVs.
• Cold weather and grime sensitivity: Cameras and radar can be impaired by snow, salt, or dirt, degrading ADAS performance until cleaned.

Taken together, these issues don’t negate the benefits of smart vehicles—such as safety aids, better efficiency feedback, and OTA improvements—but they do add cost, complexity, and risk that buyers should plan for.

What owners can do to reduce the downsides

Prospective and current owners can take practical steps to mitigate the biggest disadvantages without giving up the useful parts of connected technology.

1. Review data-sharing settings: In the vehicle, mobile app, and automaker account, opt out of nonessential data collection or analytics where possible.
2. Use strong account security: Enable multi-factor authentication on vehicle and app accounts; avoid sharing digital keys casually.
3. Stay current on updates: Apply OTA updates promptly, and check for service bulletins addressing software or sensor calibration issues.
4. Budget for ADAS-related repairs: Ask insurers and repair shops about recalibration costs for glass or body work before you need it.
5. Verify feature support offline: Test whether critical functions (locking, starting) work without the app or cellular signal; keep physical keys accessible.
6. Understand system limits: Read the driver-assistance manual and treat all assists as support, not automation; maintain full attention.
7. Scrutinize subscriptions: Track trial periods and recurring charges; cancel features you don’t use to avoid long-term drip costs.

These measures won’t eliminate every risk, but they materially reduce exposure to privacy leaks, lockouts during outages, and unexpected ownership costs.

Context: “smart car” vs. Smart, the brand

The term “smart car” often means any connected or semi-automated vehicle. If you meant Smart, the brand co-founded by Mercedes-Benz (known for the Fortwo and, more recently, the electric Smart #1 and #3 in some markets), typical disadvantages have included very limited seating and cargo space in the legacy Fortwo, choppy rides over rough roads, and sensitivity to crosswinds at highway speeds. In North America, the brand exited new-car sales in 2019, so parts, service, and resale considerations can be more challenging for older models. Newer Smart EVs sold in Europe and China bring modern tech benefits—and the same software and subscription trade-offs noted above.

Bottom line

The clearest disadvantage of a smart car is exposure to privacy and cybersecurity risks inherent in always-connected vehicles. Beyond that, owners should anticipate higher repair and calibration costs, occasional software instability, reliance on connectivity, and potential subscription add-ons. With informed setup, strong account security, and realistic expectations about driver-assistance limits, many of these drawbacks can be managed—though not entirely eliminated.

What is the life expectancy of a smart car?

The lifespan of a Smart car varies significantly by model and engine, but a well-maintained Smart Fortwo with a Mitsubishi engine could last between 100,000 and over 200,000 miles, with some diesel models potentially exceeding 250,000 miles. However, factors like driving conditions, maintenance, and the prevalence of issues with specific engines (such as 600cc or 700cc models) can shorten its life, while modern electric models may have even longer lifespans due to fewer moving parts. 
Factors influencing a Smart car’s lifespan:

• Model and Engine: Different generations and engine types have different reliability records. For instance, the 1000cc Mitsubishi engine found in the 451 generation is generally considered more reliable than earlier 450 engines. 
• Maintenance: Regular and proper maintenance, including oil changes and servicing, significantly extends a car’s life. 
• Driving Style: Highway driving is less stressful on a car than constant stop-and-go city driving, potentially leading to a longer lifespan, especially for diesels. 
• Rust: Corrosion can also be a significant factor in determining the longevity of a Smart car. 
• Software and Hardware: The health of the vehicle’s various hardware components and software updates also plays a role. 

Examples of engine lifespans:

• 600cc and 700cc 450 Fortwos: Known for problems around 60,000 to 70,000 miles, with issues like failed piston rings and burnt valves. 
• 800cc 450 and 451 CDI (Diesel) engines: Generally last much longer, with some exceeding 250,000 miles. 
• 1000cc 451 Fortwo (Mitsubishi engine): Considered reliable, with mileages often reaching over 200,000 miles. 
• Electric Smart ED: Expected to last over 100,000 miles, with electric vehicles generally having longer potential lifespans due to fewer moving parts. 

What are the years to avoid for a smart car?

Years to consider avoiding are the early 2000s models (like 2000-2007), as their engines were less reliable and fragile compared to later models. Additionally, be cautious with 2009 models, which some mechanics suggest avoiding due to potential issues, and the 2016 model with a potential parking brake cable recall. Generally, models from 2008-2015 are considered more reliable, especially the 71 ps petrol versions after 2015. 
Years and Models to Be Cautious Of

• Early 2000s (2000-2007): These older “fragile engine” models can be more prone to engine issues than later generations. 
• 2009 Models: Some mechanics recommend avoiding the 2009 model year. 
• 2016 Models: A recall was issued for the parking brake cable in some 2016 Smart ForTwo vehicles. 

More Reliable Years and Features 

• 2008-2015: This period is generally considered more reliable, especially with the Mitsubishi-built second-generation engines.
• Post-2015 Models: Often cited as providing a better overall ride.
• 71 ps Petrol Engine: This engine is considered a good, reliable option.

What to Inspect on Any Used Smart Car
Regardless of the year, a thorough pre-purchase inspection is essential. Look for: 

• Transmission: Check for jerky shifting, particularly with the automated manual transmission.
• Engine: Inspect for oil leaks, misfires, knocking sounds, and potential head gasket or timing chain issues in older models.
• Electricals: Ensure all lights, windows, and air conditioning function correctly.
• Body: Check for rust, especially around door seals and wheel arches.
• Suspension and Steering: Listen for unusual noises and check for play in the steering wheel.

What are the most common problems with a smart car?

Common problems with Smart cars include issues with their unique 5-speed automated manual transmissions, which can experience jerky shifts and a lazy clutch. Electrical problems like alternator failure, power steering issues, and problems with door locks are also reported. Suspension wear, coolant system leaks, HVAC failures, and worn brakes are other frequent issues, especially in older models or at higher mileages.
 
This video discusses common issues with Smart cars, including engine problems and steering issues: 1mVehicle FreakYouTube · Mar 1, 2024
Transmission Problems 

• Jerky Shifts: The automated manual transmission can provide poor performance, leading to noticeable and jerky shifts.
• Lazy Clutch: The clutch in these transmissions can feel sluggish or “lazy,” impacting the driving experience.
• Responsive Throttle: Owners may experience a less responsive throttle in conjunction with the transmission issues.

Electrical Issues 

• Alternator and Starter Motor: Alternators and starter motors are known to fail in Smart cars, which can lead to starting problems and a dead battery.
• Power Windows and Locks: The power windows and door locks can also malfunction.
• Dashboard Lights: Problems with the electrical system can sometimes result in dashboard lights not functioning correctly.

You can watch this video to see what to look for when buying a Smart car, including common electrical problems: 1mMiguel’s GarageYouTube · Apr 27, 2024
Suspension and Steering 

• Worn Components: The suspension and steering systems, particularly on older or high-mileage vehicles, are prone to wear and tear. 
• Power Steering Failure: Complete power steering failure can occur, making the car difficult to steer. 
• Reluctor Rings: The rear ABS reluctor rings can also wear out, affecting the anti-lock braking system. 

Other Common Problems

• Worn Brakes: Worn-out brakes and associated components like calipers and discs are a common issue requiring replacement. 
• Coolant Leaks: Leaks in the cooling system or the heater core are frequently reported. 
• HVAC Problems: Issues with the heating, ventilation, and air conditioning (HVAC) system can lead to poor airflow or failures. 
• Engine Mount Wear: The engine mounts can wear out over time.
• Door Latches: Lubricating the latch mechanisms and cables can prevent issues with doors becoming difficult to open. 

What are the weaknesses of smart cars?

Some common issues that Smart car owners run into are problems with the headlights, the steering, the engine, the transmission, and the brakes. These are all vitally important parts of a car, and so if you notice any issues with them you should get them fixed by a professional mechanic right away.