Common Problems with the Mazda CX

Mazda is a Japanese car manufacturer known for producing stylish, well-designed cars that are a pleasure to drive. This guide explores the reliability of the CX crossover SUV 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:

• Headlight problems

• Handbrake problems

• Transmission problems

• Engine problems

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 encounter 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 is £61.49 when booked through FixMyCar.

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 problem.

The average quote for electrical fault diagnostics on Mazda CX models stands at £61.49 when booked through FixMyCar.

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 £57.53 when booked through FixMyCar.

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 vehicle's catalytic converter.

The average quote for catalytic converters on Mazda CX models stands at £257.02 when booked through FixMyCar.

Mazda CX-3 2014 faults

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 vehicle will require a repair or replacement of its shock absorbers.

The average quote for a shock absorber repair on Mazda CX models is £291.40. A replacement costs £306.31 on average.

2. Engine control unit (ECU) defective

The vehicle's engine control unit may become defective, resulting in a short circuit and damage to the converter, which could result in fire. The car will likely need an engine repair to correct the control unit's fault.

The average Mazda CX ECU repair price on FixMyCar is £128.44.

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. You'll need a diagnostic test to determine the root of the problem.

The average quote for engine light diagnostics on Mazda CX models is £57.53.

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 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 creates a milky appearance.

The average quote for light and bulb repairs on Mazda CX models on FixMyCar is £76.67.

Mazda CX handbrake problems

Mazda CX-5 2016 models have a known issue: the handbrake can randomly engage itself without any manual influence. Several drivers have reported handbrake issues both when stationary and in transit, and some have noted a burning odour coming from the rear wheels.

The cause of the issue is a bad electronic parking brake module (PBM). A PBM is responsible for activating the parking A/C braking system. 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 Mazda CX handbrake repair price on FixMyCar is £82.56.

Mazda CX transmission problems

Mazda CX-3 and Mazda CX-5 models have experienced several transmission issues. As Mazda CX models are automatic, they do not feature manual gearboxes. Mazda opts out of using CVT transmissions, which are used in most similar vehicles, and instead uses SKYACTIV Technology. SKYACTIV products aim to increase engine output and fuel efficiency.

The reported transmission issues for Mazda CX models include shifter vibrations, losing speed due to a transmission fuel leak, an 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 causing problems.

The average Mazda CX transmission repair price on FixMyCar is £81.38.

Mazda CX recalls

CX-3

CX-30

CX-5

CX-60

Are Mazda CX models reliable?

Mazda CX models are considered reliable, affordable and high quality. In the 2022 Car Buyer Driver Power survey, the Mazda CX-5 came second out of 75 in the best cars to own in the UK. 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.

If you found this guide helpful, you might also like:

• Common car problems

• How to find the best car mechanic repair near you

• Common problems with the Mazda RX-8

• Common problems with the Mazda 2

• Why are the Lights Flickering in My Car?

• Why has my engine management light come on?

• When do brake calipers need replacing?