BMW

BMW questions? Ask a BMW repair Expert for answers.

Ask an Expert,
Get an Answer ASAP!

2002 530i: manual says..altenator..volts..running fine

Customer Question
i drive a 2002 530i.....
i drive a 2002 530i... the red battery indicator on the dash came on the manual says it's the alternator belt or altenator... we checked the belt it's ok... we used a voltage meter on the altenator and it is reading 12 almost 13 volts ...car is starting and running fine... any suggestions on what else could be going on?
Submitted: 8 years ago.Category: BMW
Show More
Show Less
Ask Your Own BMW Question
Answered in 11 minutes by:
6/25/2010
BMW Mechanic: Roger, BMW Master Tech replied 8 years ago
Roger
Roger, BMW Master Tech
Category: BMW
Satisfied Customers: 5,895
Experience: 10 yrs. experience as BMW Master Technician, shop foreman and dealer.
Verified

Hello,

 

I will try to help you with this. The best thing to do at this point it to monitor the battery voltage with a load on the engine. Some times when an alternator begins to fail it can be an intermittent failure before it begins to worsen. To check the alternator under load turn on the headlights, radio, seat heaters, ac, lights to put an electrical load. Normally you should see aprox 12.5 to 14 volts and it should not drop over time. If the voltage fluctuates below this then the alternator is showing signs of failing.

 

The other item to check will be the battery to make sure this might be also contributing to the problem. Check for any corrosion at the battery (located in the right rear panel in the trunk). Make sure the cables are tight as well at the terminals. You can also check the date stamp on the battery to see how old the battery is. This is located on the top of the negative terminal. If the battery is over 4 years old it can lead to the alternator overcharging and sometimes lead to an alternator failure.

 

The last possibility is that the charge on the battery was low or you have a bad cell in the battery. This can make the vehicle think the battery is low and when started the battery light will be on to inform you that the battery needs to be charged. The battery can be tested at any auto parts store for no charge to check for a bad cell.

 

I hope this information is helpful. Please accept and please let me know if I can clarify anything for you. Thank you.

Roger
Roger, BMW Master Tech
Category: BMW
Satisfied Customers: 5,895
Experience: 10 yrs. experience as BMW Master Technician, shop foreman and dealer.
Verified
Roger and 87 other BMW Specialists are ready to help you
Ask your own question now
Customer reply replied 8 years ago

hey there sorry for the delay in payment... couldn't find where i logged in ... I have other questions regarding the same car... how do i go about getting those questions to you?

 

thanks

 

bmw lady

BMW Mechanic: Roger, BMW Master Tech replied 8 years ago

Hello bmw lady,

 

I would be glad to help. You can just ask the on this post and I can see if I can help. If I can help then you can hit the accept tab just like it was a new question. If it relates to the original question, then I will do my best to try to help you further without prompting for the accept tab. Please let me know by posting back here. Thank you.

 

Ask Your Own BMW Question
Customer reply replied 8 years ago
thanks.. is there a way to tell which O2 sensor is in need of replacement the computer is showing the O2 sensor... what are symptoms that the car may be doing if the O2 sensor / sensors are bad?
Was this answer helpful?

How JustAnswer works

step-image
Describe your issueThe assistant will guide you
step-image
Chat 1:1 with a bmw mechanicLicensed Experts are available 24/7
step-image
100% satisfaction guaranteeGet all the answers you need
Ask Roger Your Own Question
Roger
Roger
Roger, BMW Master Tech
Category: BMW
Satisfied Customers: 5,895
5,895 Satisfied Customers
Experience: 10 yrs. experience as BMW Master Technician, shop foreman and dealer.

Roger 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

5,895 satisfied customers

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

Marty

Marty

ASE Certified Technician

559 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

447 satisfied customers

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

< Previous | Next >

Related BMW Questions
It just stoppef on me one day. Had to get it towed. Had the
It just stoppef on me one day. Had to get it towed. Had the battery tested, they told me it was still good, reading at 12 volts. They tested it, and said it was the starter, so we had that replaced. C… read more
Anthony
Anthony
Master Automobile Technician
Vocational, Technical or Trade Scho
8,789 satisfied customers
740il: I have a 2001 BMW 740il. The battery indicator lamp
I have a 2001 BMW 740il. The battery indicator lamp came on and the owner manual states the battery is no longer being charged and that it is either the charging circuit of the alternator or v-belt. T… read more
internal88
internal88
Product Manger
Bachelor's Degree
623 satisfied customers
325xi: I have a 2002 bmw 325xi and the other day driving down
I have a 2002 bmw 325xi and the other day driving down hiway brake/abs lights came on. when I came to a stop the lights went out and the battery light came on. when taking off from a stop car felt lik… read more
Jake
Jake
Audi Technician
Vocational, Technical or Trade Scho
2,110 satisfied customers
323ci: have a 2000 323CI and the battery check light came on.
have a 2000 323CI and the battery check light came on. The battery was low (11.8 volts) and I recharged it but light still on. I had the battery checked and it was OK but marginal so I replaced it. Th… read more
Matt
Matt
Engineer
Bachelor's Degree
447 satisfied customers
BMW x5 4.4i: This morning started car and got trans failsafe prog
BMW x5 4.4i - on vacation, arrived yesterday. This morning started car and got "trans failsafe prog". Stopped car and followed advice in manual (stop car, put on hand brake and wait a few minutes). Se… read more
Roger
Roger
BMW Master Tech
Bmw STEP Training
5,895 satisfied customers
2002 530i: sport..highway..I see Trans failsafe prog..mile or two
Hi, Just purchased a 2002 530i sport with 89k miles. On drive home, after kickdown getting onto a highway, I hear a 'clunck', dashboard lights up like a christmas tree - and I see Trans Failsafe prog.… read more
Stephen, MBA
Stephen, MBA
Master's Degree
166 satisfied customers
2002 530I: TRANS..FAILSAFE PROGRAM.....I HAD AN ALTERNATOR PUT
MY DISPLAY ON MY 2002 530I SAYS TRANS FAILSAFE PROGRAM.....I HAD AN ALTERNATOR PUT IN ABOUT 3 WEEKS AGO.....WHAT DO YOU THINK THE PROBLEM COULD BE......CAR IN LIMP MODE ....CAR WANT START AT ALL.....… read more
bimmaster
bimmaster
BMW Technician
Vocational, Technical or Trade Scho
1,838 satisfied customers
2001 BMW M5: for stone chip repairs at body shop..battery charge
2001 BMW M5. Had car in for stone chip repairs at body shop. When I went to pick up the car, they told me that the red battery charge light was on and would godd off after I drive it? They also said t… read more
bimmaster
bimmaster
BMW Technician
Vocational, Technical or Trade Scho
1,838 satisfied customers
Any Help or direction greatly appreaciated I am currently
Any Help or direction greatly appreaciated I am currently having a problem with a 530i manufacture date 07/05 The car is in Limp mode but with no EML light The car currently reads: DME-2A3F DME Valvet… read more
Sam
Sam
BMW Master technician
Vocational, Technical or Trade Scho
1,043 satisfied customers
Sport..parking brake..driving home..the car slowly lost power
Have a 2003 730i sport started the car after a couple of seconds the parking brake failure warning sounded followed by a brake failure warning and the car then went into transmition failsafe. I turned… read more
Roger
Roger
BMW Master Tech
Bmw STEP Training
5,895 satisfied customers
dash lights for the abs, brake, traction control..indicator
I have an 01 330 cic with 47k miles on it. I was driving home today and after about 25 minutes on the road (almost home) the dash lights for the ABS, brake, traction control and convertible top came o… read more
Roger
Roger
BMW Master Tech
Bmw STEP Training
5,895 satisfied customers
2001 525i: the battery light came on as I was within a mile..garage
yesterday, the battery light came on as I was within a mile of home. I have a 2001 525i. I got the car into the garage, turned it off and came into the house. We went back out to the car 5 minutes lat… read more
mike
mike
BMW Technician
Associate Degree
694 satisfied customers
Have a 2002 BMW 530i that just broke down - alternator light
Have a 2002 BMW 530i that just broke down - alternator light came on and tried to get it to the shop 45 miles away; however, the lights all dimmed and it stalled 2 blocks from the repair shop. Had to … read more
zzdaryl
zzdaryl
Lead Auto Tech
Some college and advanced training
4 satisfied customers
/>How can I test with Volt/Ohm meter to know if my alternator is
2003 mini copper s alternator question. How can I test with Volt/Ohm meter to know if my alternator is bad and needs to be replaced?… read more
jacob
jacob
Technician
Associate Degree
287 satisfied customers
BMW 318i: solenoid klicks the main lights come..alternator..regulator
When i turn the key the solenoid klicks the main lights come on (even when switched off)the starter motor does not turn. prior to this my battery had died i was driving when the battery light came on … read more
janoboy
janoboy
Bachelor's Degree
292 satisfied customers
92 BMW 525i: charging..it starts and runs fine, for a while
I have a 92 BMW 525i. It has a charging problem. If I charge the battery, it starts and runs fine, for a while. VOM shows 14+ volts just after start at the charging point. Soon it will start to drop, … read more
jeffrey590
jeffrey590
Automotive Diagnostic Specialist
Vocational, Technical or Trade Scho
7 satisfied customers
525i: BMW..1 quart coolant, looks like serpitine belt..wouldnt start
b 525i 1991 will barely turn over, or start, starter has been tested at auto zone good, battery BMW type for car tested with load good, has oil with 600 miles full synthetic from jiffy, was down 1 qua… read more
jacob
jacob
Technician
Associate Degree
287 satisfied customers
1999 323i: ac..brand new battery..volt meter..which leads
I have a 1999 323i the drive belt busted which i have replaced along with the AC belt. replaced the alternator and bought a brand new battery. the battery light comes on after i step on the gas i meas… read more
Will
Will
Shop Foreman
Some College
54 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