BMW

BMW questions? Ask a BMW repair Expert for answers.

Ask an Expert,
Get an Answer ASAP!

This answer was rated:

My daughter has bought a 2006 BMW three series second hand…

My daughter has bought...

My daughter has bought a 2006 BMW three series second hand and the engine management light came on and upon return to the dealer they said the cat was faulty as the code indicated, and replaced it under warranty. Shortly afterwards the engine mamagement ligt came on again, and upon return to thre dealer, they said it was the cat again!! - apparently there was a faulty batch and replaced it again. A short while later - the engine management light came on again and yes, it was the cat code. She went to an independant dealer, who confirmed it. The dealer she bought from are now not responding as the car is out of the three months warranty. Any help or advise would be appreciated. Many Thanks - handyal.

Mechanic's Assistant: Just to clarify, what are the exact lights you're talking about?

She said it is the engine management warning light

Mechanic's Assistant: What is the model of your '06 BMW?

Sorry - not sure, I will find out

Mechanic's Assistant: Are you fixing your vehicle yourself? What have you tried so far?

No, she has been told the cat is faulty according to the fault code read at another garage

Mechanic's Assistant: Anything else you want the mechanic to know before I connect you?

Yes, only that It does seem inconceivable that 3 cats have failed in less than 3 months with only local milage on the clock.

Show More
Show Less
Ask Your Own BMW Question
Answered in 46 minutes by:
3/17/2018
Kevin
Kevin, BMW Mechanic
Category: BMW
Satisfied Customers: 2,765
Experience: Diagnostic technician
Verified
Hi I’m Kevin the problem you have here is that in most cases the car that’s fitted is of inferior quality rather than an issue within the car . A catalytic conveyor is basically a filter in the exhaust made up of s honeycomb filter coated in chemicals . As the exhaust gases pass over the honeycomb it reacts with the chemicals inside to clean gases . Most aftermarket catalytic converters are made in the same way only the chemicals added are inferior to the dealer version and so they don’t clean gases efficiently and cause the fault code you are seeing . You will need to have a genuine catalytic converter fitted to cure this code
Kevin
Kevin, BMW Mechanic
Category: BMW
Satisfied Customers: 2,765
Experience: Diagnostic technician
Verified
Kevin and 87 other BMW Specialists are ready to help you
Ask your own question now
Customer reply replied 1 month ago
Hi Kevin, Thankyou for clarfying the situation.
Was this answer helpful?
Ask Kevin Your Own Question
Kevin
Kevin
Kevin, BMW Mechanic
Category: BMW
Satisfied Customers: 2,765
2,765 Satisfied Customers
Experience: Diagnostic technician

Kevin is online now

A new question is answered every 9 seconds

How JustAnswer works:

  • Ask an ExpertExperts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional AnswerVia email, text message, or notification as you wait on our site. Ask follow up questions if you need to.
  • 100% Satisfaction GuaranteeRate the answer you receive.

JustAnswer in the News:

Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... Justanswer.com.
JustAnswer.com...has seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like justanswer.com/legal
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.

What Customers are Saying:

I would (and have) recommend your site to others I was quite satisfied with the quality of the information received, the professional with whom I interacted, and the quick response time. Thanks, and be sure that I'll be back whenever I need a question answered in a hurry.

Stephanie PElm City, NC

used your service this weekend with "Trecers" help. thank you ,thank you, thank you. replaced an A/C fan motor. Local Auto Zone had part. $15.00 "tracer" fee and $40.00 for parts, I saved several hundreds of dollers at a shop. i will recommend you and use you in the future.

David L.Richmond, TX

9 dollars, 2 hours of my time, and I drove away. Your diagnosis was right on the mark. Thank you so much.

PhilMarysville, CA

Lurch. Thank you very much. I had real doubts about this website but your promptness of response, quick followup and to the point answer with picture was incredible.

CharlesWalnut Creek, CA

As a single woman, I really appreciate an excellent and affordable opinion.
Thank you Geordie, I will not hesitate to contact justanswer in the future!

SueCharleston, WV

Another great insight to what may be the problem. I will have my mechanic take a look at it tomorrow. Thanks again, Frank...you do indeed know your stuff.

JimCastleberry, FL

Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help.

Mary C.Freshfield, Liverpool, UK

< Previous | Next >

Meet the Experts:

Roger

Roger

BMW Master Tech

3,050 satisfied customers

10 yrs. experience as BMW Master Technician, shop foreman and dealer.

Marty

Marty

ASE Certified Technician

517 satisfied customers

ASE & Bosch Certified Master Tech. Over 30 years experience.

bimmaster

bimmaster

BMW Technician

1,838 satisfied customers

3 years dealer experience, master bmw tech

Sam

Sam

BMW Master technician

1,043 satisfied customers

BMW S.T.E.P. graduate, 10 years BMW dealership experience

Thebmwbum

Thebmwbum

BMW Foreman

714 satisfied customers

31 years BMW Experience

mike

mike

BMW Technician

694 satisfied customers

bmw master tech ase certified

Matt

Matt

Engineer

420 satisfied customers

Mechanical Engineer with 20 years experience in the auto industry, 8 yrs in formula 1 engine testing

< Previous | Next >

Related BMW Questions
Engine fult light is on. Looks light a engine yellow car
I think the book said something about a exhaust valve… read more
Marty
Marty
ASE Certified Technician
Associate Degree
517 satisfied customers
Occasionally getting “Engine Malfunction! Reduced Power”
Occasionally getting “Engine Malfunction! Reduced Power” when I excellerating hard. … read more
Stephen, MBA
Stephen, MBA
Master's Degree
166 satisfied customers
I'm working on an 07 525i with N52 engine. I had to replace
I'm working on an 07 525i with N52 engine. I had to replace the engine due to bent valves. The engine that I installed had 119K on it. It came out of a wrecked car, so it obviously ran when it was hit… read more
eric remington
eric remington
FORMER SHOP OWNER/TECHNICIAN/INSPECTOR
associates degree
457 satisfied customers
2011 bmw 335i vehicle backfired....running rough. svc engine
2011 bmw 335i vehicle backfired....running rough. svc engine light came on. … read more
Stephen, MBA
Stephen, MBA
Master's Degree
166 satisfied customers
I have a engine oil housing gasket leak i have been
i have a engine oil housing gasket leak i have been searching for ways to fix it online but most of the good tutorials on bmw 335i's (E90) while i have a 535i (E60) n54 engine … read more
Stephen, MBA
Stephen, MBA
Master's Degree
166 satisfied customers
My BMW E53 is throwing a service engine and when I scanned
Hello, my BMW E53 is throwing a service engine and when I scanned it, it says fuel bank 1 and 2-permissable range exceeded. Any thoughts? … read more
Stephen, MBA
Stephen, MBA
Master's Degree
166 satisfied customers
Engine light is on. What next? No diagnostic. had it
no diagnostic. had it inspected last fall. no issues. has been sitting in storage all winter. … read more
internal88
internal88
Product Manger
Bachelor's Degree
623 satisfied customers
Whining noise when acclerate the engine just replace the
whining noise when acclerate the engine just replace the power steering pump, and the whining is still there … read more
JayPutelis
JayPutelis
Associate Degree
565 satisfied customers
Check engine light traced to 'runs lean' diagnostic;
check engine light traced to 'runs lean' diagnostic; independent svc shop said fuel injectors need replaced; took to bmw dealer; told it was O2 sensor before cat, bank 1 defective and some small oil f… read more
Stephen, MBA
Stephen, MBA
Master's Degree
166 satisfied customers
Had a ticking sound coming from engine- mechanic said very
had a ticking sound coming from engine- mechanic said very little oil in engine even though oil had been changed 7.0k miles ago-did oil service and said the tick could be a lifter problem … read more
Todd M
Todd M
Owner
ASE Certification
1,705 satisfied customers
I recently had a brand new engine installed on my 2013 528I
I recently had a brand new engine installed on my 2013 528I BMW (80k miles) at a BMW dealership. The engine was covered under the BMW CPO service plan. The new engine was installed because my drivetra… read more
Stephen, MBA
Stephen, MBA
Master's Degree
166 satisfied customers
I have a 2004 bmw x5 with a 3.0 engine. the engine light is
I have a 2004 bmw x5 with a 3.0 engine. the engine light is on and the codes are P1620 AND P0306. what are these referring to?… read more
Kevin
Kevin
BMW Mechanic
2,765 satisfied customers
They say the engine is locked up. Never happened. 75,000.
I took it to a shop and their the ones who said engine is locked up … read more
internal88
internal88
Product Manger
Bachelor's Degree
623 satisfied customers
Check engine light on. Getting code for crank ventilation.
check engine light on. Getting code for crank ventilation … read more
JayPutelis
JayPutelis
Associate Degree
565 satisfied customers
Engine lost power and overheating light came on also
Engine lost power and overheating light came on also interior temp went cool .turned car off and then drove normal agais … read more
Matt
Matt
Engineer
Bachelor's Degree
420 satisfied customers
I get a p1720 along with and engine and transmission
I get a p1720 along with and engine and transmission failsafe and the care turns off. I do see that the voltage drops to sun 11.8 but I just changed the battery and alternator… read more
Chad Farhat
Chad Farhat
Owner
Associate Degree
5,023 satisfied customers
Just dropped a new engine in my e38 and the transmission
just dropped a new engine in my e38 and the transmission failsafe mode has been on before I put the motor in the car. The problem is the motor seems ok but ill put it to the floor and it takes a minut… read more
Stephen, MBA
Stephen, MBA
Master's Degree
166 satisfied customers
Actually my engin oil was finished and when car engine went
Actually my engin oil was finished and when car engine went off … read more
internal88
internal88
Product Manger
Bachelor's Degree
623 satisfied customers
Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Show MoreShow Less

Ask Your Question

x