BMW owner befuddled by battery that keeps draining

  • by: PAUL BRAND
  • Updated: January 18, 2013 - 3:58 PM

Q I have a 1997 BMW Z3 roadster purchased used in 2001. Since Day One, the battery will go flat if I leave the car sitting for more than a few days. Two different BMW shops have been unable to diagnose the problem. The battery that came with car and a new one needed to be replaced because of so many deep discharge cycles. I installed a battery cut-off switch to save the third battery and make sure the car will start when I want it to. Of course, I need to reset the clock and the audio system settings each time. My brother, an automotive mechanic, says the first thing he would check is the alternator because the diode sometimes goes bad and allows a small reverse current flow. Have you ever encountered this?

ADVERTISEMENT

New England 2/1/15 5:30 PM
Seattle
Milwaukee 6:00 PM
Orlando
New York 6:00 PM
Indiana
Denver 7:00 PM
Memphis
Chicago 9:30 PM
LA Lakers
Montreal 6:00 PM
NY Rangers
Winnipeg 6:00 PM
Philadelphia
Boston 6:00 PM
NY Islanders
Arizona 6:30 PM
Toronto
Dallas 6:30 PM
Ottawa
Detroit 6:30 PM
Tampa Bay
Columbus 6:30 PM
Florida
Nashville 7:00 PM
St. Louis
Minnesota 8:00 PM
Calgary
Buffalo 8:30 PM
Edmonton
Anaheim 9:00 PM
San Jose
DePaul 1:00 PM
Providence
Michigan State 5:00 PM
Rutgers
Boston Univ 6:00 PM
Army
Fla Atlantic 6:00 PM
Charlotte
Youngstown St 6:00 PM
Detroit
East Tenn St 6:00 PM
Furman
Saint Louis 6:00 PM
George Mason
USC Upstate 6:00 PM
Jacksonville
High Point 6:00 PM
Liberty
Central Conn St 6:00 PM
Long Island
Western Ky 6:00 PM
Louisiana Tech
Dayton 6:00 PM
Massachusetts
Chattanooga 6:00 PM
Mercer
Wofford 6:00 PM
UNC Greensboro
Maryland 6:00 PM
Ohio State
FIU 6:00 PM
Old Dominion
Fair-Dickinson 6:00 PM
Robert Morris
Mount St Marys 6:00 PM
St Francis-NY
Bryant 6:00 PM
St Francis-PA
Northern Ky 6:00 PM
Stetson
Coll of Charleston 6:00 PM
Towson
Western Carolina 6:00 PM
Va Military
Sacred Heart 6:00 PM
Wagner
Lipscomb 6:00 PM
Fla Gulf Coast
Kennesaw St 6:00 PM
North Florida
Appalachian St 6:30 PM
Ga Southern
Holy Cross 6:30 PM
Loyola-Maryland
Eastern Ill 6:30 PM
UT Martin
Jacksonville St 7:00 PM
Belmont
Connecticut 7:00 PM
Cincinnati
Rider 7:00 PM
Saint Peters
SIU Edwardsville 7:00 PM
SE Missouri St
Marshall 7:00 PM
Southern Miss
Tenn Tech 7:00 PM
Tennessee St
Middle Tennessee 7:00 PM
TX-San Antonio
Ill-Chicago 7:00 PM
Milwaukee
Weber State 7:00 PM
North Dakota
Denver 7:00 PM
North Dakota St
IUPU-Ft Wayne 7:00 PM
South Dakota
Louisiana 7:05 PM
South Alabama
Georgia State 7:15 PM
Texas-Arlington
Ark-Little Rock 7:30 PM
Arkansas State
ULM 7:30 PM
Troy
Portland 8:00 PM
Gonzaga
Kentucky 8:00 PM
Missouri
Eastern Ky 8:00 PM
Murray State
UAB 8:00 PM
Texas-El Paso
Idaho State 8:00 PM
Northern Colorado
UMKC 8:00 PM
Grand Canyon
Chicago State 8:05 PM
Utah Valley U
Colorado 8:30 PM
USC
Cal Poly 9:00 PM
UC Irvine
Hawaii 9:00 PM
CS-Northridge
Pepperdine 9:00 PM
Pacific
Santa Clara 9:00 PM
San Diego
Utah 9:00 PM
UCLA
UC Santa Barbara 9:00 PM
UC Davis
Montana 9:05 PM
Portland State
Montana State 9:05 PM
Sacramento St
Long Beach State 9:30 PM
Cal State Fullerton
Loyola Marymount 9:30 PM
St Marys-CA
San Francisco 10:00 PM
BYU
California 10:00 PM
Washington St
Louisiana 11:00 AM
South Alabama
Saint Josephs 11:30 AM
Saint Louis
Appalachian St 4:00 PM
Georgia Southern
Niagara 4:00 PM
Saint Peters
Old Dominion 5:00 PM
FIU
Southern Miss 5:00 PM
Marshall
Georgia State 5:00 PM
TX-Arlington
Ark-Little Rock 5:05 PM
Arkansas State
ULM 5:15 PM
Troy
Pittsburgh 5:30 PM
(17) Duke
(6) Tennessee 6:00 PM
(10) Kentucky
(24) Oklahoma 6:00 PM
(14) Texas
Nebraska Omaha 6:00 PM
IUPU-Ft Wayne
UC-Riverside 6:00 PM
CS-Northridge
Army 6:00 PM
Boston U
New Orleans 6:00 PM
Nicholls
Charlotte 6:00 PM
Florida Atlantic
Towson 6:00 PM
Delaware
Hofstra 6:00 PM
Northeastern
New Hampshire 6:00 PM
Maine
Albany 6:00 PM
Vermont
Hartford 6:00 PM
Stony Brook
UNC-Wilmington 6:00 PM
William & Mary
Clemson 6:00 PM
Wake Forest
Alabama 6:00 PM
(1) South Carolina
(23) Syracuse 6:00 PM
(8) Louisville
Missouri 6:00 PM
Florida
Iona 6:00 PM
Fairfield
Manhattan 6:00 PM
Marist
NC State 6:00 PM
Virginia
(4) Notre Dame 6:00 PM
Virginia Tech
(22) Rutgers 6:00 PM
Purdue
(5) Maryland 6:00 PM
Michigan
Milwaukee 6:00 PM
Cleveland State
Wright State 6:00 PM
Oakland
Jacksonville 6:00 PM
USC Upstate
North Florida 6:00 PM
Kennesaw St
Stetson 6:00 PM
Northern Ky
Loyola-Maryland 6:05 PM
Holy Cross
Lamar 6:30 PM
Sam Houston St
Fla Gulf Coast 6:30 PM
Lipscomb
Vanderbilt 7:00 PM
(18) Miss State
IUPUI 7:00 PM
Western Ill
Abilene Christian 7:00 PM
Houston Baptist
Incarnate Word 7:00 PM
TX A&M-CC
McNeese State 7:00 PM
SE Louisiana
Oral Roberts 7:00 PM
South Dakota St
Louisiana Tech 7:00 PM
Western Ky
TX-San Antonio 7:00 PM
Middle Tennessee
Texas-El Paso 7:00 PM
UAB
Auburn 7:00 PM
Arkansas
Grand Canyon 7:00 PM
UMKC
Illinois 7:00 PM
(15) Nebraska
(20) Iowa 7:00 PM
Northwestern
Utah Valley U 7:05 PM
Chicago State
Green Bay 7:05 PM
Valparaiso
Ole Miss 8:00 PM
LSU
Portland State 8:00 PM
Montana
Sacramento St 8:00 PM
Montana State
North Dakota 8:00 PM
Weber State
Ohio State 8:00 PM
Wisconsin
Northern Colorado 8:00 PM
Idaho State
BYU 9:00 PM
San Francisco
St Marys-CA 9:00 PM
Loyola Marymount
Pacific 9:00 PM
Pepperdine
Cal-Irvine 9:00 PM
UC Santa Barbara
San Diego 9:00 PM
Santa Clara
UC Davis 9:00 PM
Cal Poly
Long Beach St 10:59 PM
Hawaii
Connect with twitterConnect with facebookConnect with Google+Connect with PinterestConnect with PinterestConnect with RssfeedConnect with email newsletters

ADVERTISEMENT

ADVERTISEMENT

ADVERTISEMENT