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Common problems with the Mazda CX

Matthew James, 2 months ago

5 min read

  • Advice
  • carproblems
  • Mazda
Mazda CX5

WhoCanFixMyCar covers the most common Mazda CX problems, discussing overall reliability and repair cost.

Mazda is one of the world’s most premier automakers, noted for producing efficient sports vehicles. The Mazda CX was first introduced in April 2006 with the CX-9. The CX models in particular are known for being crossover SUV’s, currently offering 8 different models. Mazda have produced midsize, compact and subcompact vehicles within their CX range.

Mazda’s range of CX models includes:

  • CX-9: Introduced April 2006

  • CX-5: Introduced 2012

  • CX-3: Introduced November 2014

  • CX-4: Introduced April 2016

  • CX-8: Introduced 2017

  • CX-30: Introduced January 2019

  • CX-50: Introduced 2022

  • CX-60: Introduced April 2022

This article will place an emphasis on issues with the CX-3 and CX-5 models.


What’s wrong with the Mazda CX?

Some common problems reported on Mazda CX models include:

Mazda CX-5 2012 to 2017 faults

Here are four common faults found in the 2012 to 2017 CX-5 models, including how much a repair is likely to cost.

1. Control short circuit

A short circuit can occur within the control circuit which could cause the engine to cut out, and reduce brake assistance.

If you come across this issue, you will need an electrical technician to help diagnose and repair the issue. The average quote for electrical fault diagnostics on Mazda CX models stands at £54.97 when booked through WhoCanFixMyCar.

2. Daytime running lamps flickering

Each Mazda CX model is fitted with two daytime LED running lights. An electrical fault within the CX models can result in these lights flickering, or failing completely.

If you come across this issue, you will need an electrical technician to help diagnose and repair the issue. The average quote for electrical fault diagnostics on Mazda CX models stands at £54.97 when booked through WhoCanFixMyCar.

3. Fuel pump impeller failure

The low-pressure fuel pump impeller may become deformed causing fuel pump failure. In this case, the check engine light will almost certainly appear to warn you of any issues within the fuel pump. If the light does appear, you will require a diagnostic to determine the root of the problem.

The average quote for engine light diagnostics and repair on Mazda CX models stands at £205.48 when booked through WhoCanFixMyCar.

4. Selective catalytic reduction system (SCR) Damage

The selective catalytic reduction system (SCR) wiring may become damaged by contamination. SCR aims to reduce Nitrous Oxide (NOx) emissions by combining exhaust gases with AdBlue.

In this scenario, the repair required may be a replacement of the vehicles catalytic converter.

The average quote for catalytic converters on Mazda CX models stands at £330.68 when booked through WhoCanFixMyCar.

Mazda CX-3 2014 faults

Most owners of 2014 Mazda CX-3 are generally happy with their cars. However, there are a few common problems to be aware of. 

1. Stub axle and shock absorber loose connection

The screw connection between the stub axle and the shock absorber may come loose, resulting in loss of steering. The most likely outcome of this is most that the vehicle will require a repair or replacement of its shock absorbers.

The average quote for shock absorber repairs on Mazda CX models stands at £291.40, with replacement standing at £288.16, when booked through WhoCanFixMyCar.

2. Engine control unit (ECU) defective

The engine control unit of the vehicle may become defective, resulting in a short circuit and damage to the converter, which could result in fire. In this case, the vehicle is likely to need an engine repair in order to correct the control unit fault.

The average quote for ECU repairs on Mazda CX models stands at £245.50 when booked through WhoCanFixMyCar.

3. Fuel pump impeller failure

The low-pressure fuel pump impeller may become deformed causing fuel pump failure. In this case, the check engine light will almost certainly appear to warn you of any issues within the fuel pump. If the light does appear, you will require a diagnostic to determine the root of the problem.

The average quote for engine light diagnostics and repair on Mazda CX models stands at £205.48 when booked through WhoCanFixMyCar.


Mazda CX headlight problems

Mazda CX-5 models have become known for a particular issue that arises within its headlights. Many users have reported a defect within LED or high-intensity discharge headlights, which results in the lenses appearing as though they have been stained a milky white colour, which in turn can reduce the lighting ability.

This is caused by a gas that’s emitted from a leaking gasket in the lamp unit, which adheres to the lens. A reaction between the gas and the anti-clouding coating on the lens, generating the milky appearance.

The average quote for light and bulb repairs on Mazda CX models stands at £79.45 when booked through WhoCanFixMyCar.


Mazda CX handbrake problems

There is a known issue with Mazda CX-5 2016 models, whereby the handbrake can randomly engage itself without any manual influence. Several customers have reported handbrake issues both when stationary and in transit. The issues have ranged from the vehicle failing to move upon start-up, to the vehicle engaging the handbrake automatically whilst in transit, which can pose a risk to the individual user and others on the road. In some cases, customers have noted a burning odour coming from the rear wheels.

In general, the cause of the issue comes back to a bad electronic parking brake module (PBM). A PBM is responsible for the activation of the A/C braking system for parking. In other instances, the root of the problem may be faulty brake callipers. It is always best to conduct a diagnostic test on the vehicle.

The average quote for handbrake repairs on Mazda CX models stands at £75.23 when booked through WhoCanFixMyCar.


Mazda CX transmission problems

Both Mazda CX-3 and Mazda CX-5 models have been noted for a string of transmission issues. As all As Mazda CX models are automatic, they do not feature manual gearboxes, and Mazda opts out of using CVT transmission as is the case for most similar vehicles, and instead use SKYACTIV Technology, which are a series of automobile technologies produced by Mazda. SKYACTIV products aim to increase the engine output as well as its fuel efficiency.

The reported transmission issues for Mazda CX models include: shifter vibration, losing speed as a result of a transmission fuel leak, unresponsive transmission and in some cases (mainly with the 2016 CX-5 model) the vehicle could start moving when in park. In most cases, the condition of the transmission fluid is the main factor in causing transmission problems. In particular: if the fluid is leaking, is burnt, is worn out or is contaminated.

The average quote for transmission repairs on Mazda CX models stands at £96.00 when booked through WhoCanFixMyCar.

Mazda CX engine problems

On the whole, Mazda CX models are known for good quality engines with a few range of faults reported. That being said however, there are still some issues with both CX-3 and CX-5 models. An issue reported with the CX-3 is the engine cranking and failing to fire. This can be quite a difficult issue to diagnose, but tends to come down to problems with fuel and ignition, or could even be an indicator of clogged fuel injectors.

The CX-5 has had one issue prominently reported, with their being a ticking sound coming from the turbo from time to time. This is not usually a major cause for concern, and is usually a reaction to poor lubrication or inadequate fuel.

The average quote for engine repairs on Mazda CX models stands at £245.50 when booked through WhoCanFixMyCar.


Are Mazda CX models reliable?

The Mazda CX models overall are seen as a reliable, affordable and high quality. The vehicle is known for its smooth driving, excellent handling and a very aesthetically appealing interior and exterior. In the 2022 Car Buyer Driver Power survey, the Mazda CX-5 was placed at second out of 75 in the best cars to own in the UK. Astonishingly, the Mazda CX-5 also secured a five star safety rating from the experts at Euro NCAP in their 2017 crash test, with the CX-3 securing a four star rating.

Overall, it appears that although there have been a number of issues associated with CX models, overall they are considered extremely reliable. Average quotes from WhoCanFixMyCar suggest CX models to be affordable in repairs, and therefore appear to be an excellent choice should you be requiring an efficient sports vehicle.


Mazda CX recalls

ProblemModels Affected
Fuel pump may failCX-5 Apr 2018 – Oct 2018
Fuel pump may failCX-3 Oct 2017 – Sep 2019
Brake hose may failCX-3 May 2015 – May 2016
Selective Catalytic Reduction (SCR) damaged by contaminationCX-5 May 2015 – Sep 2024
Engine FailureCX-3 Apr 2015 – Nov 2017
Tailgate may drop down without warningCX-3 Feb 2015 – Dec 2015
Charging control program failureCX-3 Feb 2015 – Apr 2017
Daytime LED running light may failCX-5 Dec 2014 – Dec 2015
Soot may gather inside the engineCX-5 Jan 2012 – Jun 2018
Fuel injector mounting nuts may become looseCX-5 Jan 2012 – Jan 2016
Fuel injector software may be defectiveCX-5 Jan 2012 – Jan 2016
Vacuum pump may wear out prematurelyCX-5 Jan 2012 – Jan 2016
Tailgate may drop down without warningCX-5 Nov 2011 – Dec 2015

Having problems with your Mazda CX? WhoCanFixMyCar can help you find the right garage at the right price.


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