Low frequency magnetic fields induced by car tire magnetization.
Stankowski S, Kessi A, Bécheiraz O, Meier-Engel K, Meier M.

Berne University of Applied Sciences at Biel, Quellgasse 21, CH-2500 Biel, Switzerland. stefan.stankowski@bfh.ch

Abstract
Alternating magnetic fields have been measured in a variety of different cars, the dominant contribution being from magnetized tires. Magnetic field strengths have been measured as a function of frequency directly at the tires and at different positions in rolling cars. Measurements at the tires showed field strengths up to 100 microtesla (microT). In the interior of rolling cars, close to the wheels at foot regions and at the back seat, field strengths of several microT were obtained in the 10-200 hertz (Hz) frequency domain. In some cases measured field values were considerably higher than those found in previous studies. Purposely magnetizing single tires made it possible to study the influence of various parameters. Degaussed tires retained low field values over prolonged time under conditions of normal use.

PMID: 16404172 [PubMed - indexed for MEDLINE]

BMW
1998 BMW 740iL -
Driver: 2.5 milli gauss,
passenger: 20.0 milli gauss.
Driver Rear: 2.5 milli gauss
Passenger Rear: 20.0 milli gauss

2006 BMW X3 -
Driver: 15.0 milli gauss,
passenger: 25.0 milli gauss.
Driver Rear: 12.0 milli gauss
Passenger Rear: 25.0 milli gauss

2009 BMW 328i -
Driver: 5.5 milli gauss,
passenger: 28.0 milli gauss.
Driver Rear: 8.0 milli gauss
Passenger Rear: 25.0 milli gauss
Driver Front Floor: 35.0 milli gauss
Passenger Front Floor: 95.0 milli gauss

Buick
1998 Buick Le Sabre -
Driver: 0.2 milli gauss
passenger: 0.4 milli gauss.
Driver Rear: 0.2 milli gauss
Passenger Rear: 0.2 milli gauss

Chevrolet
2010 Impala -
Driver: 0.2 milli gauss
passenger: 1.0 milli gauss.
Driver Rear: 0.2 milli gauss
Passenger Rear: 0.2 milli gauss
Driver Front Floor: 2.0 milli gauss
Passenger Front Floor: 35.0 milli gauss
Driver: 0.1 milli gauss

1974 Camaro -
Driver: 0.2 milli gauss
passenger: 0.4 milli gauss.

2006 Silverado 1500 -
Driver: 0.2 milli gauss
passenger: 0.1 milli gauss.
Driver Rear: 0.1 milli gauss
Passenger Rear: 0.1 milli gauss
Driver Front Floor: 1.5 milli gauss
Passenger Front Floor: 1.5 milli gauss

Cadillac
1994 Seville -
Driver: 1.5 milli gauss
passenger: 0.8 milli gauss.
Driver Rear: 2.0 milli gauss
Passenger Rear: 0.8 milli gauss

2006 CTS v6 -
Driver: 0.2 milli gauss.

2005 SRX v6 -
Driver: 0.3 milli gauss.
Passenger: 1.2 milli gauss
Driver Rear: 0.8 milli gauss
Passenger Rear: 2.5 milli gauss

2005 SRX v8 -
Driver: 0.3 milli gauss.
Passenger: 1.0 milli gauss
Driver Rear: 0.8 milli gauss
Passenger Rear: 2.5 milli gauss
Driver Front Floor: 2.5 milli gauss
Passenger Front Floor: 2.5 milli gauss

2010 SRX v6 -
Driver: 18.0 mili gauss.
Passenger: 7.0 milli gauss
Driver Rear: 3.5 milli gauss
Passenger Rear: 0.8 milli gauss
Driver Front Floor: 55.0 milli gauss
Passenger Front Floor: 35.0 milli gauss

Chrysler
2006 PT Cruiser ** -
Driver: 0.6 milli gauss.
Passenger: 0.5 milli gauss
Driver Rear: 0.1 milli gauss
Passenger Rear: 0.2 milli gauss

Dodge
2006 Magnum v6 -
Driver: 7.0 milli gauss.

Ford
2006 F150
Driver: 0.4 milli gauss
passenger: 0.4 milli gauss.

Honda
2003 CR-V -
Driver: 3.5 milli gauss
Passenger: 6.0 milli gauss

Jeep
2005 Wrangler -
Driver: 1.4 milli gauss
Passenger: 1.2 milli gauss

Lexus
1993 LS400 -
Driver: 1.0 milli gauss;
Passenger: 2.0 milli gauss

1999 LS430 -
Driver: 1.6 milli gauss;
Passenger: 1.6 milli gauss
Driver Rear: 3.0 milli gauss
Passenger Rear: 1.0 milli gauss

Mercedes
1999 SL600 -
Driver: 15.0 milli gauss
Passenger: 50.0 milli gauss
Driver Rear: 30.0 milli gauss
Passenger Rear: 500 milli gauss

2004 C240 -
Driver: 2.5 milli gauss
Passenger: 2.0 milli gauss
Driver Rear: 3.0 milli gauss
Passenger Rear: 0.4 milli gauss

Mercury
2000 Sable -
Driver: 1.0 milli gauss
Passenger: 1.0 milli gauss
Driver Rear: 0.2 milli gauss
Passenger Rear: 0.9 milli gauss

Nissan
2005 350zx -
Driver: 1.8 milli gauss;
Passenger: 2.5 milli gauss

Oldsmobile
1984 Delta 88 -
Driver: 0.1 milli gauss

Porche
2004 Boxter -
Driver: 35.0 milli gauss;
Passenger: 40.0 milli gauss

Saab
2005 -
Driver: 3.0 milli gauss
Passenger: 1.5 milli gauss

Toyota
2006 Highlander -
Driver: 1.0 milli gauss.

2006 Tundra -
Driver: 7.0 milli gauss
Passenger: 7.0 mili gauss

Subaru
2006 Outback 4 cylinder -
Driver: 3.0 milli gauss.

Volkswagon
2006 Jetta -
Driver: 3.0 milli gauss

Volvo
2006 S60 -
Driver: 15.0 milli gauss, passenger: 3.0 milli gauss.
Driver Rear: 15.0 milli gauss
Passenger Rear: 4.0 milli gauss