Bosch BMW Electrical Sensors, Switches, & Relays for BMW Z3 (1996-2002)

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Electrical gremlins can be very frustrating. Luckily your BMW's electrical system is better than most, even if it's 25 years old. Here you will find electrical relays, sensors, switches, and modules for the engine, camshaft, and crankshaft. Our parts are OEM, Genuine BMW, or approved aftermarket brands that we have an excellent track record with. There is no middle ground with electrical parts - it either works perfectly or not. And there's nothing more frustrating than a new part that fails right out of the box. So it's important to choose quality replacement parts over a cheap but faulty piece.

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OEM Bosch Voltage Regulator (90amp/120amp) -- E46 E39 E53 Z3 ...
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T#:373840
Part#: 12317559183
In Stock
$ 37.99

This product was last offered at the strikethrough price on
04-13-2026

$ 37.36 USD
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$ 37.36 USD
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Ensure the correct voltage is being sent to/from the alternator, keep you electrical system safe from excessive voltage peaks that could cause damage to sensitive electronics and blow out fuses. Bosch's high quality unit will give you peace of mind knowing the electrical system will be safe and the voltage will remain steady. OEM replacement for BMW part # 12317559183 and 12317501752.

Cars that have oval or D shaped connector use BMW part # 12317515319

Bosch is one of the largest OEM producers of Genuine BMW and aftermarket parts in the world, providing parts for almost every major automotive manufacturer. Bosch has likely supplied many of the original electrical (and mechanical) parts for your BMW. Thanks to their quality, high durability, and reliability, you should expect a long service life from Bosch products.

As a leading source of high performance BMW parts and accessories since 1993, we at Turner Motorsport are honored to be the go-to supplier for tens of thousands of enthusiasts the world over. With over two decades of parts, service, and racing experience under our belt, we provide only quality performance and replacement parts.  All of our performance parts are those we would (and do!) install and run on our own cars, as well as replacement parts that are Genuine BMW or from OEM manufacturers. We only offer parts we know you can trust to perform!

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OEM Bosch Alternator - E46 M3, Z3 S54
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T#:370775
Part#: 12317831436
In Stock
$ 512.99

This product was last offered at the strikethrough price on
03-30-2026

$ 322.99 USD
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$ 322.99 USD
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A replacement Bosch alternator for the 2001-2006 M3. Bosch is an original equipment supplier to BMW, and is the finest and most recognized German brand of alternator available. The Original BMW alternator sells for over double! Buy only the best alternator for your BMW -- buy a Bosch alternator. This is an OEM replacement for BMW part # 12317831436.

Bosch is one of the largest OEM producers of Genuine BMW and aftermarket parts in the world, providing parts for almost every major automotive manufacturer. Bosch has likely supplied many of the original electrical (and mechanical) parts for your BMW. Thanks to their quality, high durability, and reliability, you should expect a long service life from Bosch products.

As a leading source of high performance BMW parts and accessories since 1993, we at Turner Motorsport are honored to be the go-to supplier for tens of thousands of enthusiasts the world over. With over two decades of parts, service, and racing experience under our belt, we provide only quality performance and replacement parts.  All of our performance parts are those we would (and do!) install and run on our own cars, as well as replacement parts that are Genuine BMW or from OEM manufacturers. We only offer parts we know you can trust to perform!

A $80.00 refundable core charge must be applied to this alternator. Upon receipt of your rebuildable alternator core, you will be refunded the core charge. 

This item fits the following BMWs:
2001-2006 E46 BMW M3, M3 Convertible
2001-2002 Z3 BMW M Roadster M Coupe

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OEM Bosch Alternator AL0703N - 120A - E38 E39 E46 E53 Z3
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Bosch - Corporate Logo
T#:583735
Part#: 12317501690
In Stock
$ 526.99

This product was last offered at the strikethrough price on
03-03-2026

$ 415.99 USD
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$ 415.99 USD
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If your car has died on the side of the road from a dead battery and you notice flickering or low powered headlights, it's likely your alternator failing. To be sure you are getting a high-quality part with a long life-span, choose this OEM Bosch Alternator. This is a brand new OEM replacement for BMW part # 12317501690.

Bosch is one of the largest OEM producers of Genuine BMW and aftermarket parts in the world, providing parts for almost every major automotive manufacturer. Bosch has likely supplied many of the original electrical (and mechanical) parts for your BMW. Thanks to their quality, high durability, and reliability, you should expect a long service life from Bosch products.

As a leading source of high-performance BMW parts and accessories since 1993, we at Turner Motorsport are honored to be the go-to supplier for tens of thousands of enthusiasts the world over. With over two decades of parts, service, and racing experience under our belt, we provide only quality performance and replacement parts. All of our performance parts are those we would (and do!) install and run on our own cars, as well as replacement parts that are Genuine BMW or from OEM manufacturers. We only offer parts we know you can trust to perform!

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Bosch Remanufactured Starter - E46 M3, S54
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T#:373451
Part#: 12417835735KTBOS
Ships in 6 Business Days
$ 366.99 USD
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$ 366.99 USD
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This starter offers reliable performance at a fraction of the cost of a new unit, providing peace of mind and ensuring your BMW starts smoothly every time. This remanufactured starter from Bosch will allow your car to start like it is new. Includes $70 core charge. 
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BMW E46 E39 E53 Z3 OEM Bosch Alternator - 120amp
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Bosch - Corporate Logo
T#:373543
Part#: 12317501599
In Stock at Vendor
$ 526.99

This product was last offered at the strikethrough price on
05-07-2026

$ 511.99 USD
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$ 511.99 USD
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If you car has died on the side of the road from a dead battery and you notice flickering or low powered head lights, it's likely your alternator failing. To be sure you are getting a high quality part with a long life-span, choose this OEM Bosch Alternator. This is an OEM replacement for BMW part # 12317501599.

Bosch is one of the largest OEM producers of Genuine BMW and aftermarket parts in the world, providing parts for almost every major automotive manufacturer. Bosch has likely supplied many of the original electrical (and mechanical) parts for your BMW. Thanks to their quality, high durability, and reliability, you should expect a long service life from Bosch products.

As a leading source of high performance BMW parts and accessories since 1993, we at Turner Motorsport are honored to be the go-to supplier for tens of thousands of enthusiasts the world over. With over two decades of parts, service, and racing experience under our belt, we provide only quality performance and replacement parts.  All of our performance parts are those we would (and do!) install and run on our own cars, as well as replacement parts that are Genuine BMW or from OEM manufacturers. We only offer parts we know you can trust to perform!

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OEM Bosch Remanufactured Starter - E30 E34 E46 E39 Z3
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Bosch - Corporate Logo
T#:373255
Part#: 12417578684KT
Ships in 5 Business Days
$ 307.99

This product was last offered at the strikethrough price on
05-07-2026

$ 300.99 USD
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$ 300.99 USD
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Includes a $71.50 core charge to be refunded after we receive your refundable core If your car won't turn over, there is a good chance your starter is shot. Bosch's OEM starter is a high-quality replacement that will give you peace of mind thanks to its long life-span. Bosch is one of the largest OEM producers of Genuine BMW and aftermarket parts in the world, providing parts for almost every major automotive manufacturer. Bosch has likely supplied many of the original electrical (and mechanical) parts for your BMW. Thanks to their quality, high durability, and reliability, you should expect a long service life from Bosch products. As a leading source of high-performance BMW parts and accessories since 1993, we at Turner Motorsport are honored to be the go-to supplier for tens of thousands of enthusiasts the world over. With over two decades of parts, service, and racing experience under our belt, we provide only quality performance and replacement parts. All of our performance parts are those we would (and do!) install and run on our own cars, as well as replacement parts that are Genuine BMW or from OEM manufacturers. We only offer parts we know you can trust to perform!
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OEM Bosch Alternator - 120 Amp - E46, E39, Z3
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Bosch - Corporate Logo
T#:359520
Part#: AL0738XKITKT
Ships on Jun 29, 2026
$ 307.00 USD
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$ 307.00 USD
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If your car has died on the side of the road from a dead battery and you notice flickering or low powered head lights, it's likely your alternator failing. To be sure you are getting a high quality part with a long life-span, choose this OEM Bosch Alternator. This is an OEM replacement for BMW part # 12311432980 and 12317501690.

Bosch is one of the largest OEM producers of Genuine BMW and aftermarket parts in the world, providing parts for almost every major automotive manufacturer. Bosch has likely supplied many of the original electrical (and mechanical) parts for your BMW. Thanks to their quality, high durability, and reliability, you should expect a long service life from Bosch products.

As a leading source of high performance BMW parts and accessories since 1993, we at Turner Motorsport are honored to be the go-to supplier for tens of thousands of enthusiasts the world over. With over two decades of parts, service, and racing experience under our belt, we provide only quality performance and replacement parts.  All of our performance parts are those we would (and do!) install and run on our own cars, as well as replacement parts that are Genuine BMW or from OEM manufacturers. We only offer parts we know you can trust to perform!


A refundable core charge must be applied to this alternator. Upon receipt of your rebuildable alternator core, you will be refunded the core charge. 

This Bosch Alternator fits the following BMWs:
1997-2000 E39 5 Series 528i
2000 E46 3 Series 323i 323ci 328i 328ci
1997-2000 Z3 Roadster Z3 2.3 Z3 2.8

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Bosch Starter Motor for E36 E46 Z3 6 Cylinder (SR0448X)
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Bosch - Corporate Logo
T#:338004
Part#: 12411712937
Ships on Jun 29, 2026
$ 283.99

This product was last offered at the strikethrough price on
05-07-2026

Starting at $ 277.00 USD
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Starting at $ 277.00 USD
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E36/E46/M50/M52/M54 STARTER - THIS ONE IS THE "LATER" STYLE THAT DOES NOT REQUIRE NUTS. A refundable core charge will be added to your sale, refunded to you when we get your old starter back. Replaces Bosch part number SR0445X.

Bosch is one of the largest OEM producers of Genuine BMW and aftermarket parts in the world, providing parts for almost every major automotive manufacturer. Bosch has likely supplied many of the original electrical (and mechanical) parts for your BMW. Thanks to their exacting assembly process and high level of durability you can expect a long service life from all Bosch products.​

This item fits the following BMWs:
1990-1991 E30 BMW 318i 318is 318ic
1992-1998 E36 BMW 318i 318is 318ti 318ic 323is 323ic 325i 325is 325ic 328i 328is 328ic M3
1999-2005 E46 BMW 323i 323ci 325i 325ci 325xi 328i 328ci 330i 330ci 330xi
1991-1995 E34 BMW 525i
1997-2003 E39 BMW 525i 528i 530i
2004-2005 E60 BMW 525i 530i
2004-2005 E83 BMW X3 2.5i X3 3.0i
1996-2002 Z3 BMW Z3 1.9 Z3 2.3 Z3 2.5i Z3 2.8 Z3 3.0i
1998-2000 Z3 BMW M Roadster M Coupe
2003-2005 E85 BMW Z4 2.5i Z4 3.0i
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OEM Bosch Fuel Pump Relay -- e30 e36 e46 e28 e34 e39 e24 e23 e32 e38 ...
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Bosch - Corporate Logo
T#:2857
Part#: 61311373585
In Stock
$ 11.99 USD
Free Shipping on orders $49 and up

If you have a faulty fuel pump relay, fuel will not be pumped to the engine and your engine may not start. Replace your relay with this high quality Bosch replacement to restore fuel pump operation.

Bosch is one of the largest OEM producers of Genuine BMW and aftermarket parts in the world, providing parts for almost every major automotive manufacturer. Bosch has likely supplied many of the original electrical (and mechanical) parts for your BMW. Thanks to their quality, high durability, and reliability, you should expect a long service life from Bosch products.

As a leading source of high performance BMW parts and accessories since 1993, we at Turner Motorsport are honored to be the go-to supplier for tens of thousands of enthusiasts the world over. With over two decades of parts, service, and racing experience under our belt, we provide only quality performance and replacement parts.  All of our performance parts are those we would (and do!) install and run on our own cars, as well as replacement parts that are Genuine BMW or from OEM manufacturers. We only offer parts we know you can trust to perform!

This 4 prong relay fits many BMW's and fulfulls a variety of functions. Please check your relay pins configuration to ensure the proper fitment. Fits BMW 2002, e30 e36 e46 e28 e34 e39 e24 e23 e32 e38 e31 z3


This item fits the following BMWs:
1970-1976 2002 BMW 1600 2002 2002tii
1984-1991 E30 BMW 318i 318is 318ic 325e 325es 325i 325ic 325is 325ix M3
1992-1998 E36 BMW 318i 318is 318ti 318ic 323is 323ic 325i 325is 325ic 328i 328is 328ic M3
1999-2005 E46 BMW 323i 323ci 325i 325ci 325xi 328i 328ci 330i 330ci 330xi M3
1982-1988 E28 BMW 524td 528e 533i 535i 535is M5
1989-1995 E34 BMW 525i 530i 535i 540i M5
1997-2003 E39 BMW 525i 528i 530i 540i M5
1982-1989 E24 BMW 633csi 635csi M6
1981-1987 E23 BMW 733i 735i
1988-1994 E32 BMW 735i 735il 740i 740il 750il
1995-2001 E38 BMW 740i 740il 750il
1990-1999 E31 BMW 840i 840ci 850i 850ci 850csi
1997-2002 Z3 BMW Z3 1.9 Z3 2.3 Z3 2.5i Z3 2.8 Z3 3.0i M coupe M Roadster

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15A Fuse - Priced Each
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Bosch - Corporate Logo
T#:375327
Part#: 61131372626
In Stock at Vendor
$ 2.03 USD
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Bosch Alternator - E36 318i/is, Z3 1.9 Liter 1996-1998
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Bosch - Corporate Logo
T#:224712
Part#: AL0736X
Ships on Jun 29, 2026
$ 421.99

This product was last offered at the strikethrough price on
05-07-2026

$ 411.99 USD
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$ 411.99 USD
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Replacement 90 amp Bosch alternator for e36 318i/is with either the M42 or M44 engine and Z3 1.9 liter roadster, with the M44 4 cylinder engine. Bosch is an original equipment supplier to BMW, and is the finest and most recognized German brand of alternator available. Buy only the best alternator for your BMW -- buy a Bosch alternator.

Bosch is one of the largest OEM producers of Genuine BMW and aftermarket parts in the world, providing parts for almost every major automotive manufacturer. Bosch has likely supplied many of the original electrical (and mechanical) parts for your BMW. Thanks to their exacting assembly process and high level of durability you can expect a long service life from all Bosch products.

A refundable core charge must be applied to this alternator. Upon receipt of your rebuildable alternator core, you will be refunded the core charge.

This Bosch Alternator fits the following BMWs:
1994-1998 E36 BMW 318i 318is 318ti 318ic
1996-1998 Z3 Roadster 1.9 liter 4 cylinder
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Bosch Alternator - 120 Amp - E46, E39, Z3 2001-2005 (with factory Val...
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Bosch - Corporate Logo
T#:386207
Part#: AL0703X
Ships on Jun 29, 2026
$ 844.99 USD
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$ 844.99 USD
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120 amp Bosch alternator for many BMW 6 cylinders (see list below). Replaces stock Valeo alternator with rectangular plug on the back. Bosch is an original equipment supplier to BMW, and is the finest and most recognized German brand of alternator available. Buy only the best alternator for your BMW -- buy a Bosch alternator. Same as BMW part#1231751599. 

Bosch is one of the largest OEM producers of Genuine BMW and aftermarket parts in the world, providing parts for almost every major automotive manufacturer. Bosch has likely supplied many of the original electrical (and mechanical) parts for your BMW. Thanks to their exacting assembly process and high level of durability you can expect a long service life from all Bosch products.

A refundable core charge must be applied to this alternator. Upon receipt of your rebuildable alternator core, you will be refunded the core charge. 

This alternator has a rectagular connector on the back! Please check to ensure you are getting the correct alternator  

This Bosch Alternator fits the following BMWs:
1998-2000  E39 5 Series  528i
2001-2003  E39 5 Series  525i & 530i
2001-2005  E46 3 Series  325i, 325Ci, 325xi - only for cars with M54 engine
2001-2005  E46 3 Series  330i, 330Ci & 330xi
2001-2002  Z3 Roadster  Z3 2.5 liter 
2003-2005  Z4 Roadster/Coupe  Z4 2.5 liter & Z4 3.0 liter
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Re-manufactured Starter Motor - Priced Each
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Bosch - Corporate Logo
T#:3471789
Part#: 124123547095KT
Back Ordered
$ 346.99

This product was last offered at the strikethrough price on
04-09-2026

$ 327.99 USD
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$ 327.99 USD
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Price Included a $40.00 Core Charge