Cars
Vans
Classics
Good Garage Guide
Kit
Sign up
Profile
Log in
Log out
Ask HJ
Ask Honest John
Find Answers
Search Topics
Ask Honest John
Buying
Selling
Owning
Driving
Technical Matters
Classic Cars
Vans
Insurance
Products
General Feedback
Mobility
Good Garages Recommendation
MoT Results
I have read and agree to the
terms and conditions
Recently Asked Questions
Why is my Kia over-revving on gear change?
What solar battery trickle charger do you recommend?
Can you haggle over a cash price when buying a car?
I am looking for a seven seat vehicle that I can use for both private and work - what do you suggest?
Can a car warranty be transferred?
News
News
Latest News
New Car News
Buying & Selling News
Car Tax & Budget News
All New Cars Coming in 2025
In Depth
Car tax VED rates 2025/26
Satisfaction Index Results 2025
Latest News Headlines
Tougher action needed on hand car wash illegal workers
The government is cracking down on hand car wash businesses that employ illegal workers – but a trade body thinks it should go further still
Question of the week: Why is 100 RON petrol not sold in the UK?
"Recently while on holiday in Greece I noticed that some petrol stations were selling three grades of unleaded petrol - 95, 98 and 100 RON."
Reviews
Car Reviews and Guides
Car Reviews
Best & Cheapest Cars
Long Term Tests
Choose A Type Of Car
Small SUV
Small car
SUV
Hybrid
Electric
Pick Your Next Car
Select a make
Ford
BMW
Volkswagen
Honda
Toyota
Audi
Vauxhall
Nissan
Mercedes-Benz
Skoda
Peugeot
Kia
View all
Latest Reviews
5
Renault 5 E-Tech (2025)
3
MG 4 EV XPower (2024)
Insurance
Insurance
Car insurance advice
Insurance group finder
Get cheaper car insurance
Best car insurance companies
GAP insurance explained
Advice
Buying
All buying advice
Buying a used car
Approved used cars
Your consumer rights
Owning
All owning advice
Check for recalls
Dash warning lights
Cambelt or timing chain checker
Running costs
All running costs advice
Cheap breakdown cover
Used car warranties
Car tax rates 2024
Driving
All driving advice
Appealing a parking ticket
Speeding fines and penalties
ULEZ zone explained
Pricing
New Car Prices & Specifications
New Car Prices, Specs and Tech Data
Used Car Pricing
Used car valuations
Best places to sell your car
Used Car Pricing Search (2000 on)
Value my car
with
,000 miles
to
buy or sell?
buy
sell
other
Cars For Sale
New Cars
New Cars For Sale
New Vans For Sale
Used Cars
Cars For Sale
Vans For Sale
Classics For Sale
Best Deals
Best PCP Deals
Lease Deals
Best 0% APR Deals
£0 Deposit Deals
Best Cars for £99 a month
Nearly New Car Deals
Cars by Location
England
Scotland
Wales
Northern Ireland
London
Cars Near You
Sell Your Car
Value your car ›
Audi
BMW
Ford
Honda
Hyundai
KIA
Land Rover
Mazda
Mercedes-Benz
Nissan
Peugeot
Skoda
Toyota
Vauxhall
Volkswagen
Real MPG
Real MPG
Select a make
Submit your Real MPG
Best Real MPG performers
Fuel Calculator
Petrol or Diesel?
What is the Fuel Calculator?
Compare
two
cars to find the
lowest fuel cost
Latest Submissions
3 Series (2012 - 2019)
74%
i20 (2009 - 2015)
82%
Forum
Back Room Forum
Enter the Back Room
Register for the Back Room
Search the forum
Mazda 3 - EGR
Honest John
Back Room
»
Technical matters
View Threaded
Tue 10 Mar 2020 08:29
Mazda 3 - EGR - elekie&a/c doctor
Any chance of posting the complete story with all the relevant car details. ? Egr faults can give different symptoms on different cars . Are we talking petrol or diesel here ?
Reply
|
Report as offensive
|
Link
Cars for Sale
2015 Mazda 3
2.0 Sport Nav 5dr
£7,068
Details
Mazda 3
2.5 e-Skyactiv G MHEV [140] Centre-Line 5dr
£25,830
Details
2020 Mazda 3
2.0 Skyactiv X MHEV Sport Lux 5dr
£14,845
Details
2022 Mazda 3
2.0 e-Skyactiv X MHEV [186] SE-L Lux 5dr
£18,570
Details
Find more cars like this
![2022 Mazda 3 2.0 e-Skyactiv X MHEV [186] SE-L Lux 5dr](http://images.honestjohn.co.uk/imagecache/url/crop/90x60/https/cdn.uk.prod.group-mobility-trader.com/images/cas/a63ec14bb60d9e1f3723510a94672886/23adc009f522b43f7e399773a1563f5f.jpg)
