Buying a used Smart Forfour: what to check before you pay
A complete used-buyer checklist for the Smart Forfour. Engine, gearbox, electrics, paperwork.

The Smart Forfour is a compact city car known for its unique design and manoeuvrability. When considering a used model, it’s essential to check for common issues, service history, and overall condition to ensure a reliable purchase. This guide provides a full checklist to help you decide with confidence.
Understanding the Smart Forfour
The Smart Forfour is a four-seater city car that combines practicality with a distinctive style. Launched in 2004 and later reintroduced in 2014, it offers a compact footprint ideal for urban driving. The latest models feature efficient engines and a range of personalisation options, making them appealing to a diverse audience.
When considering a used Forfour, it’s important to understand the differences between the two generations. The first generation is known for its quirky design but may lack some modern features found in the second generation, which offers improved technology and safety ratings.
Common Issues to Look For
Like any used vehicle, the Smart Forfour has its share of common problems. Owners have reported issues with electrical systems, particularly in older models. Additionally, the automatic transmission can be prone to faults, leading to jerky gear changes. Inspecting the car’s service history is crucial to identify whether these issues have been addressed.
Check for signs of wear and tear, especially in the interior and exterior. Look for rust, particularly around the wheel arches and under the car, as this can indicate a lack of maintenance. A thorough test drive can also help identify any mechanical problems that may not be immediately visible.
Service History and Maintenance
A comprehensive service history is vital when purchasing a used Smart Forfour. Regular maintenance ensures the longevity of the vehicle and can prevent costly repairs down the line. Check if the car has been serviced according to the manufacturer’s recommendations, and look for any major repairs that may have been carried out.
The Smart Forfour is generally reliable, but it is essential to verify that routine checks, such as oil changes and brake inspections, have been performed. The DVSA MOT data can provide insight into the car’s past performance and any advisories that may have been issued during its lifetime.
Checking the Bodywork and Interior
The Smart Forfour’s unique design can make it susceptible to minor cosmetic damage. Inspect the bodywork for dents, scratches, and signs of previous repairs. Pay close attention to the paint quality and ensure that the colour matches across all panels, as mismatched paint can indicate previous accidents.
Inside the vehicle, check the condition of the seats, dashboard, and controls. Look for any signs of excessive wear or damage, particularly in high-use areas like the steering wheel and gear stick. Ensure that all electronic features, such as the infotainment system and air conditioning, are functioning correctly.
Tyres and Suspension
Tyres are a crucial aspect of any used car purchase. Check the tread depth and overall condition of the tyres on the Smart Forfour. Uneven wear can indicate alignment issues or suspension problems. The legal minimum tread depth in the UK is 1.6mm, but it is advisable to have at least 3mm for better safety and performance.
Inspect the suspension by pushing down on each corner of the car. If it bounces back excessively, this may indicate worn shocks or struts. A test drive can also help assess the suspension’s performance, as any knocking or unusual noises may signal underlying issues.
Test Drive and Performance
A test drive is an essential step in the buying process. It allows you to assess the Smart Forfour’s performance and comfort. Pay attention to how the car accelerates, brakes, and handles corners. Listen for any unusual noises that may indicate mechanical issues.
During the test drive, evaluate the visibility and driving position. The Forfour is designed for urban environments, so its compact size should make it easy to manoeuvre. Ensure that the steering feels responsive and that the car tracks straight without pulling to one side.
Final Checks and Negotiation Tips
Before finalising your purchase, conduct a final check of the vehicle’s documentation. Verify the V5C registration document and ensure that the Vehicle Identification Number (VIN) matches the one on the car. Additionally, check for any outstanding finance or insurance claims associated with the vehicle.
When it comes to negotiation, be prepared to discuss any issues you have identified during your inspection and test drive. Use this information to justify your offer, and don’t hesitate to walk away if the price does not reflect the car’s condition. A well-researched buyer is often in a stronger position to negotiate a fair deal.
Frequently asked questions
What should I look for when buying a used Smart Forfour?
Check the vehicle's service history, mileage, and condition. Look for any signs of wear and tear, especially on the interior and exterior.
Are Smart Forfour cars reliable?
Generally, Smart Forfour models are considered reliable, but it's important to check for any common issues reported by previous owners. Regular maintenance can help ensure longevity.
What is the fuel economy of the Smart Forfour?
The fuel economy can vary depending on the engine type and driving conditions. On average, you can expect decent fuel efficiency, making it a cost-effective choice for city driving.
How much does insurance cost for a Smart Forfour?
Insurance costs can vary based on factors like your age, driving history, and location. Generally, the Smart Forfour is in a lower insurance group, making it more affordable to insure.
Is the Smart Forfour suitable for families?
Yes, the Smart Forfour offers a surprising amount of space for a small car, making it a good option for small families. It has rear seats that can accommodate children comfortably.
What are the common problems with Smart Forfour?
Some owners have reported issues with electrical components and gearbox problems. It's advisable to have a thorough inspection before purchasing to identify any potential issues.
How does the Smart Forfour compare to other small cars?
The Smart Forfour stands out with its unique design and compact size, making it ideal for urban driving. However, it may have less boot space compared to some competitors.
What features should I expect in a Smart Forfour?
Expect features like air conditioning, Bluetooth connectivity, and a decent sound system. Higher trims may offer additional features like parking sensors and upgraded infotainment systems.
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Sources
DVSA MOT History, Honest John reliability index, Parkers owner reviews, WhatCar reliability survey, UK Government MOT failure data.