Mazda2018–2023

6 2.5: Common faults & known problems

Common faults & known problems

2 known faults documented in workshop bulletins. Of these, one concerns the engine and fuel system and one the suspension and drivetrain. Symptoms, causes, repair steps and part numbers are shown where supplied.

Technical specifications

Engine & fuel system

1 documented fault — symptoms, causes and workshop fixes.

Lack of power

Overview

Affects: All models with petrol engines, →04/16.
Fault codes: P0300P0301P0302P0303P0304
Remedy: Fit modified part
Parts: 1 part

Symptoms

Engine malfunction indicator lamp (MIL) illuminated. Trouble codes stored: P0300, P0301, P0302, P0303, P0304. Erratic idle.

Cause

Faulty ignition coil(s). Note: This fault is only associated with ignition coils made by Yumebishi.

Repair

Check ignition coil(s) for damage and/or high resistance.
Fit modified ignition coils as necessary.

Parts1 part

Parts listed in the bulletin
Part	Part number	Qty
Ignition coil	PE20-18-100A	As required

Data: Motorwise Workshop. Bulletin 2.

Suspension & drivetrain

1 documented fault — symptoms, causes and workshop fixes.

Vibration through vehicle whilst driving, more noticeable at 25-30mph (40-50kph)

Affects All models with automatic transmission.Fit modified part

Cause

Excessive wear in front driveshaft inner joint due to poor material characteristics.

Repair

Fit modified front driveshaft inner joint.

Data: Motorwise Workshop. Bulletin 1.

Glossary

Technical terms used in this guide.

MIL: Malfunction indicator lamp — the engine warning light on the dashboard
Trouble Codes: Standardised fault codes stored by the engine control module, read with a diagnostic tool
Driveshaft: The shaft that takes drive from the differential out to a wheel

Frequently asked questions

What are the common faults with the Mazda 6 2.5?

This guide contains two workshop bulletins for the Mazda 6 2.5. Of these, one concerns the engine and fuel system and one the suspension and drivetrain. Symptoms, causes, repair steps and part numbers are shown where supplied.

Does every Mazda 6 2.5 have these faults?

No. These are patterns documented across the model by workshops, not predictions for an individual vehicle. Where a fault applies only to certain vehicles or VIN ranges, that is listed with the fault.

Can I check for Mazda 6 2.5 faults myself?

Many of them. The documented symptoms can be seen, heard or felt during a test drive.