Question about 2001 Hyundai Elantra

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Over charging alt

I have a 2001 hyundia elantra, my battery started bubbling over, checked with voltmeter and its charging at 17.5 volts, replaced the alternator twice and still reading 17.5 while idling. is there any other electrical device that might be interfering with the charging system?

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  • Hyundai Master
  • 22,219 Answers

No do yourself a favour and fit a genuine BOSCH exchange unit ---bet you a pound to a penny this will cure the problem

Posted on Dec 30, 2013

Testimonial: "thank you collin, three alternators thou? same voltage reading, gonna have to dig deep into the wallet for a new one."


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Posted on Jan 02, 2017

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SOURCE: taillights for 2001 hyundia elantra

its real easy open trunk lid take rear sill off should just pop off then take trim panels each side then there are 4 bolts each side 10mm tkae bolts out firmly pull on tail lights they should come out and then reverse back

Posted on Jan 26, 2009

Sgt Fluffy
  • 157 Answers


You really need a test drive by a tech. Any shop should be able to do that and give you a firm (written) estimate. It might not be a big deal. Shop around if you need a rebuild, If you need one, ask about their warranty. Believe it or not, a good reference for a tranny shop is the Used Car Manager at the Hyundai dealership. Go in to ask him, not over the phone, and be nice. You're asking for a favor after all. Many dealers do a lot of their work outside the store for reasons of cost. It all depends on the dealership. One will, one won't. Ask.

Posted on Jun 11, 2009

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SOURCE: 2001 Hyundia 300 charging problem.

The 12.2 volt reading to me would indicate a battery voltage only which is fine. However the 11.9 voltage would indicate to me how much voltage the starting system actually used from the battery supply voltage being the differance between the two amounts.I would do the following fully charge the battery one more time and take the same two readings over again and after taking the second reading turn on all the acessorries and if what i am thinking is correct the 11.9 volt reading will drop a consideral amount and possibly stall the engine. If this happens the voltage regulator in the alternator is not working.Take the alternator back, and trade it for a differant one. An alternator needs to be putting out at least 13 to 14.5 volts when under load to compensate for the load.Good Luck and have a good Xmass.

Posted on Dec 12, 2010

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Replace coil pack

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I would check alternator charge first....if you have voltmeter, check the charge rate by placing the voltmeter on the positive and negative should be 13.8-14.2 volts whilst the engine is running........if it is...then replace the battery as it is not holding enough charge.......if it isnt, then i would suspect a faulty alternator which is not charging the battery enough.......I would also lubricate the window rubbers with with spray silicone, as dry rubbers can also increase the load on the window lifter an extra point

I hope this helps....goods luck\

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Taillights for 2001 hyundia elantra

its real easy open trunk lid take rear sill off should just pop off then take trim panels each side then there are 4 bolts each side 10mm tkae bolts out firmly pull on tail lights they should come out and then reverse back

Jan 26, 2009 | 2001 Hyundai Elantra

1 Answer

Alternator when warm over charges 16 17 volts is regulator inside

are you boiling your battery?
are you having starting problem?
a shorted battery will cause you alt to charge very hard.

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