Top fixes

Mitsubishi ASX top fixes: how owners handle the common issues

Practical fixes for the common Mitsubishi ASX faults owners run into.

Updated 4th September 2026 DVSA data: Across 28,531 recorded MOT tests, 21.7% failed.

Mitsubishi ASX
Image via Wikipedia, CC-licensed.

The Mitsubishi ASX is a popular compact SUV, but like any vehicle, it can experience issues. Common problems reported by owners include electrical faults, suspension issues, and engine performance concerns. Fortunately, many of these problems have practical fixes that can help restore your ASX to optimal condition.

Electrical Faults

One of the most frequently reported issues with the Mitsubishi ASX is electrical faults, particularly with the central locking system and dashboard warning lights. These problems can often be traced back to a faulty battery or poor connections.

To address these issues, start by checking the battery terminals for corrosion and ensuring they are tightly connected. If the battery is old or weak, consider replacing it. Additionally, inspect the fuses related to the central locking system and replace any that are blown. If dashboard warning lights persist, a diagnostic scan can help identify underlying issues.

Suspension Problems

Owners have reported problems with the ASX’s suspension, particularly with the front struts and rear shock absorbers. These components can wear out over time, leading to a bumpy ride and decreased handling performance.

To fix suspension issues, first, conduct a visual inspection of the struts and shock absorbers for any signs of leaks or damage. If you notice any problems, replacing the worn components is essential. Upgrading to higher-quality aftermarket parts can also improve ride quality and longevity. Regular maintenance, including checking wheel alignment and tyre pressure, can help prevent premature wear.

Engine Performance Concerns

Some ASX owners have experienced engine performance issues, including rough idling and decreased power. These problems can often be attributed to a clogged air filter, faulty spark plugs, or issues with the fuel system.

Start by replacing the air filter and checking the spark plugs for wear. If they appear worn, replace them to improve engine performance. Additionally, consider using a fuel system cleaner to remove any deposits that may be affecting fuel delivery. Regular servicing, including oil changes and using high-quality fuel, can also help maintain optimal engine performance.

Transmission Issues

Transmission problems can be a significant concern for ASX owners, particularly with automatic models. Symptoms may include slipping gears, delayed shifting, or unusual noises. These issues can often stem from low transmission fluid levels or worn components.

To address transmission issues, first, check the fluid level and condition. If the fluid is low, top it up with the manufacturer-recommended fluid. If the fluid is dark or has a burnt smell, a transmission fluid change may be necessary. For more severe issues, it may be best to consult a professional mechanic to diagnose and repair any internal transmission problems.

Brake System Concerns

The brake system is crucial for safety, and some ASX owners have reported issues such as squeaking brakes or a spongy brake pedal. These problems can often be attributed to worn brake pads, low brake fluid, or air in the brake lines.

To resolve brake issues, start by inspecting the brake pads for wear. If they are worn down, replacing them is essential. Check the brake fluid level and top it up if necessary. If the brake pedal feels spongy, it may indicate air in the brake lines, which can be resolved by bleeding the brakes. Regular brake inspections can help catch issues early and ensure safe driving.

Tyre Wear and Alignment

Uneven tyre wear is a common issue reported by ASX owners, often caused by improper alignment or suspension problems. This can lead to reduced handling and increased fuel consumption.

To fix tyre wear issues, start by checking the tyre pressure and ensuring it is at the recommended levels. If the tyres are unevenly worn, consider having a professional alignment performed. Regularly rotating the tyres can also help promote even wear and extend their lifespan. Keeping an eye on tread depth is crucial for safety, and replacing tyres when they reach the minimum tread depth is essential.

By addressing these common issues with practical fixes, Mitsubishi ASX owners can maintain their vehicles and enjoy a reliable driving experience. Regular maintenance and prompt attention to any problems can help ensure your ASX remains in top condition for years to come.

Mitsubishi ASX recall record

13 recalls have been issued for the Mitsubishi ASX, between 2012 and 2024.

  1. Mitsubishi ASX Exhaust

    R/2024/416

    Issued 2 December 2024

    On affected vehicles a crack may occur at the welded joint of rear muffler to tail pipe resulting in potential detachment of the tail pipe.

    Remedy:Replace muffler with a muffler fitted with a reinforcement bracket.

    Affects cars built Jan 2011 to Dec 2019

  2. INAPPROPRIATE ECU PROGRAM FOR THE BATTERY DETERIORATION JUDGMENT (STATE OF CHARGE)

    R/2018/347

    Issued 8 January 2019

    Inappropriate ECU program for battery deterioration judgement.

    Remedy:Reprogram the software with the countermeasure software.

    Affects cars built Jun 2010 to Sept 2011

  3. THE BRAKE HYDRAULIC UNIT FUNCTION MAY BE INTERRUPTED

    R/2018/285

    Issued 3 November 2018

    Driver assist programme functions through the hydraulic brake unit may be interrupted.

    Remedy:The ECU will be rewritten with modified software.

    Affects cars built Sept 2017 to Mar 2018

  4. WHERE TAIL PIPE IS WELDED TO THE EXHAUST SILENCER A CRACK MAY APPEAR

    R/2018/247

    Issued 12 October 2018

    Exhaust tailpipe section may crack at silencer weld.

    Remedy:Check and replace silencer if cracked. Fit support bracket if not cracked.

    Affects cars built Jun 2010 to Oct 2017

9 older recalls not shown.

A recall applies to a build range, not to every car of this model. Check a registration to see whether one specific vehicle has an outstanding recall.

Mitsubishi ASX MOT record

From 28,531 recorded MOT tests, 21.7% failed.

MOT pass and failure rates by year of first registration
RegisteredTestsFailedMedian mileage
20214977.4%32,440 mi
20201,4677.8%33,139 mi
20191,5818.5%39,628 mi
20182,17313.0%49,637 mi
20173,94117.8%58,821 mi
20163,15318.5%68,000 mi
20154,43421.8%76,540 mi
20143,64127.8%86,008 mi

Most common reasons for failure

  1. Brake pipe damaged or excessively corroded25.3%
  2. Tyre tread depth not in accordance with the requirements24.6%
  3. A suspension pin, bush or joint excessively worn20.9%
  4. a brake lining or pad worn below 1.5mm17.1%
  5. Brake disc or drum excessively weakened, insecure or fractured12.2%

Figures cover every Mitsubishi ASX tested in the DVSA dataset, not this specific car. Check a registration for the actual history of one vehicle.

Frequently asked questions

What common issues should I look for in a Mitsubishi ASX?

Common issues with the Mitsubishi ASX include problems with the suspension, electrical faults, and engine performance. It's advisable to check for any warning lights on the dashboard and listen for unusual noises during a test drive.

How can I tell if the ASX has been well maintained?

Check the service history for regular maintenance records, including oil changes and inspections. A well-maintained ASX should have a complete service book and receipts for any repairs.

Are there any recalls on the Mitsubishi ASX I should be aware of?

Recalls are issued against individual vehicles rather than a model as a whole, so a model-level yes or no would be guesswork. Enter the registration on Honest Car Check and we check the DVSA record for that specific car. Where DVSA holds no status, confirm it with a franchised dealer using the VIN.

What are the typical repair costs for a Mitsubishi ASX?

Repair costs can vary widely depending on the issue and the garage. Routine maintenance like brake pad replacement is generally affordable, while more complex repairs, such as transmission issues, can be more expensive.

Is the Mitsubishi ASX reliable for long-distance driving?

The Mitsubishi ASX is generally considered reliable for long-distance driving, provided it has been well maintained. Regular servicing and checks can help ensure it performs well on longer journeys.

What should I do if I notice a warning light on my ASX?

If a warning light appears, it's best to consult the owner's manual to identify the issue. If the light indicates a serious problem, seek professional assistance as soon as possible to avoid further damage.

How can I improve the fuel efficiency of my Mitsubishi ASX?

To improve fuel efficiency, ensure your tyres are properly inflated and consider regular servicing to keep the engine running smoothly. Driving habits, such as avoiding rapid acceleration and maintaining a steady speed, can also help.

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