Low-mileage vehicles are often the holy grail for used car shoppers. A 10-year-old car that should have 120,000 miles, but has less than half that on the odometer, might be considered a “find.” However, there’s a lot more to consider than how little time the car spent on the road.

An underused vehicle, or one that has spent years sitting in a garage or driveway, can develop problems unrelated to mileage. Inactivity can lead to deteriorated seals, cracked rubber components, brake corrosion, aging tires, stale fluids, battery problems, and mechanical issues that may require expensive repairs.

This doesn’t mean buyers should avoid low-mileage vehicles; quite the contrary, as many can make excellent purchases. However, you should try to find out why the car has so few miles on it. There’s a big difference between a gently used car that was well-maintained and one that spent years in storage.

Understanding the distinctions, along with proactive measures like a pre-purchase inspection and an extended car warranty, can minimize repair risk.

What “Low Mileage” Actually Means in Context

Low mileage means different things to different people. So, let’s work off of averages. According to the Federal Highway Administration, the typical American drives about 13,500 miles annually. An ordinary 10-year-old car should have about 135,000 miles on the odometer.

How much lower than average is “low mileage?” CarGurus affordability research shows that a car purchased for the same budget now carries significantly more miles than it did a few years ago, evidence that meaningfully low-mileage used cars represent a genuine minority of the used market rather than the norm.

The challenge comes from determining why a car accumulated fewer miles than expected. Perhaps the vehicle was owned by a retiree who rarely drove. Also, since the pandemic, more people have been working from home, reducing the time spent behind the wheel and even the need for a car. On the other hand, a vehicle might have sat due to the owner’s health issues or financial problems. Or the worst-case scenario: the car had mechanical problems.

Modern vehicles function best when regularly driven; inactivity can negatively affect many systems. Coolant flow keeps the cooling system in peak condition, while oil circulation preserves seals and lubricates moving parts. At the same time, driving keeps the battery charged. Those are just a few examples of why a car shouldn’t sit idle for extended periods.

Problem 1: Dried and Cracked Seals, Gaskets, and Rubber Components

While you may think of a car as mostly metal, rubber components are crucial to keeping a vehicle in good operating condition. Here are the vulnerable areas:

• Engine seals
• Valve cover gaskets
• Coolant hoses
• Vacuum lines
• Serpentine belts
• CV joint boots
• Suspension bushings
• Motor mounts
• Transmission mounts
• Fuel lines
• Brake hoses
• Intake ducting
• Seals for the cooling and climate-control systems

This doesn’t cover tires, weatherstripping (for doors, windows, and the trunk), or windshield wiper blades. Regular driving helps maintain component flexibility during weather cycles through fluid circulation, regular maintenance, and periodic cleaning.

Any degradation may not be noticed until the car returns to the road. An engine may develop oil leaks from dried seals. Coolant hoses could crack under pressure. CV boots can split, allowing contamination into drivetrain components.

As a result, buyers shouldn’t assume that low mileage means less wear. This may be the case with some mechanical systems, but age affects rubber regardless of how much the vehicle was used. Seals, hoses, and belts may still need to be replaced.

Buyers can look for cracking, discoloration, hardening, and signs of fluid leaks around seals and gaskets. A professional pre-purchase inspection should include the same steps.

Problem 2: Brake Corrosion and Rotor Damage

Brake systems are equally vulnerable to deterioration when not used. Rotors can develop a thin layer of rust after only a few days. That’s not an issue if the car gets driven periodically, as the braking action can clear away the buildup.

However, more significant corrosion can develop if the car sits for months or years. Eventually, the rotor surfaces become pitted as moisture accelerates oxidation. At this point, driving (and braking) is unlikely to remove the pitting. Symptoms include vibrations, uneven braking, excessive noise, and reduced stopping power.

Corrosion can also affect the brake calipers during extended periods of vehicle inactivity. The sliding pins and pistons are susceptible to damage, causing uneven pad wear or brake malfunctions.

Brake work can be expensive. Here’s a cost breakdown:

Minor surface rust on the rotors is normal, but deep pitting, grooves, or unusual wear patterns require a closer look by a mechanic. A professional should test the caliper function.

A low-mileage vehicle may be in good mechanical condition but still require significant fluid maintenance to get back on the road. Flushing the brake, power steering, and coolant fluids and replacing the engine oil and transmission fluid can cost $1,000 or more. Fortunately, fluid services are usually straightforward, assuming there are no underlying problems.

Check service records and look for fluid changes based on time-based schedules rather than mileage alone.

Problem 4: Battery and Electrical System Issues

One of the often-overlooked challenges of buying a car that’s been parked for a while is the potential for a troublesome battery and electrical system. The vehicle’s 12-volt battery can slowly discharge, leading to a shorter battery life. And most batteries only last three to five years to begin with.

While a trickle charger may help preserve battery health, that may not be enough to keep the battery capable for everyday use. A basic battery test may not show any issues; the trouble may not surface until the car undergoes real-world loads.

Electric problems can extend beyond the battery itself. Corrosion can develop on the battery cables and ground connections. Rodents also have a knack for damaging wiring in stored vehicles. In addition, electronic modules may develop communication issues after extended periods of inactivity. Electrical issues are notorious for being difficult and expensive to diagnose.

A pre-purchase inspection should include a battery load test, a check of the charging system, and a scan for any stored fault codes.

Problem 5: Tire Age vs. Tire Tread

While shoppers may check tire tread depth and sidewall condition, there are other factors to consider about tires. Most important is confirming the age of the tires. A 10-year-old car with 40,000 miles could easily still be on its original tires. However, most tires only have a usable lifespan of 6 to 10 years—the range some vehicle and tire manufacturers recommend for replacement regardless of tread wear, as reported by the National Highway Traffic Safety Administration (NHTSA). So, it might be time for replacements, regardless of the remaining tread.

Tire compounds can stiffen and crack over time. Plus, if the car was stationary for any length of time, the tires may have developed flat spots.

Before purchasing any low-mileage vehicle, locate the DOT date code on each tire. The final four digits indicate the week and year of manufacture. For example, a code ending in 2418 indicates the tire was produced during the 24th week of 2018. The manufacturer determines a tire’s lifespan, with most recommending replacement at 6–7 years. Some tires are rated for 10 years.

According to Consumer Reports, its members spent an average of $212 per tire. Add in wheel alignment, and a full set can easily cost $1,000. Trucks, SUVs, and performance vehicles may require more expensive tires.

The Pre-Purchase Inspection Checklist for Low-Mileage Vehicles

A low-mileage car may look clean and ready for the road after a walk-around, but a professional pre-purchase inspection goes beyond appearance. A $200–$300 investment can catch potential red flags before they become your responsibility.

In addition to a comprehensive check of all systems and a test drive, a low-mileage vehicle inspection should include:

• Evidence of fluid leaks around seals and gaskets
• Inspection of coolant hoses and vacuum lines
• Inspection of CV boots and suspension bushings
• Brake rotor surfaces and brake system operation
• Engine oil condition
• Transmission fluid condition
• Brake fluid moisture content
• Coolant condition and service history
• Battery load testing
• Charging system testing
• OBD diagnostic scan for active and stored fault codes
• Tire DOT date codes and overall tire condition

Why a Vehicle History Report Isn’t Enough

Like a pre-purchase inspection, a vehicle history report should be part of a used car buyer’s due diligence. An AutoCheck or Carfax report can provide valuable information about accidents, title brands, ownership activity, and odometer readings.

However, these reports may not provide details about how the vehicle was maintained during the years of limited use. Ideally, you want service records to supplement a vehicle history report. Any maintenance records about regular oil changes or fluid services can be reassuring.

How an Extended Warranty Can Help With Low-Mileage Used Cars

Low-mileage vehicles sometimes create a false sense of security. However, some car components remain vulnerable to failure, despite the reduced digits on the odometer. That’s where an extended warranty or vehicle service contract (VSC) can be invaluable.

While a powertrain plan (for the engine, transmission, and drive axles) is essential for coverage on any vehicle with an expired factory warranty, it may not be enough protection. Systems commonly affected by underuse and long-term storage may require a more comprehensive program. Endurance offers mid- and top-tier plans that protect electrical components, A/C systems, fuel-delivery components, seals, gaskets, and certain electronic modules. In fact, Endurance Supreme has the fewest exclusions and is most similar to a new car warranty.

Every Endurance customer enjoys access to 24/7 roadside assistance, rental car support, and trip interruption protection. Plan holders can also choose any licensed facility for covered repairs, including dealership service centers and specialty shops. Endurance also offers a 30-day money-back guarantee and flexible payment plans.

Looking Beyond the Odometer

A low-mileage car can be an outstanding purchase, but its below-average time on the road won’t eliminate the risk of a breakdown or surprise repair bills. And in some cases, certain systems could be even more vulnerable.

To learn more about the peace of mind that comes from an Endurance auto protection plan, request a FREE quote. Visit our online store for instant plan and pricing details. Contact an Endurance plan advisor at (800) 253-8203 to review custom coverage options.

Check out free resources like the Endurance Blog, with expert-written articles, and our Vehicle Guides, which cover repair history for popular models.