Passenger sub makes no sound, drivers sub working fine

mjposner · 12-31-2014, 06:19 AM

I always thought the balance was off on my E93 I bought in September. I finally tested and there is no sound at all coming from the sub under the passenger seat. Is it worth it to lift seat and open for lose wire or is the=is more likely an amp issue.

Dealer is swamped and wants me to wait to bring in (car was in twice last month, one to fix roof, second to fix roof again (and it looks like they didn't fix correct;y so it has to go in again for that as well).

cdgatti · 12-31-2014, 09:10 AM

could be anywhere, head unit, amp or speaker connection. could even be a faulty amp.

Jgio83 · 12-31-2014, 07:13 PM

Check underseat first. Not hard to lift up seat. Just make sure you disconnect battery if u plan on unhooking the underseat wire harness.

mjposner · 12-31-2014, 08:06 PM

Not sure I have a 50 torx lying around to lift seat....

Jgio83 · 12-31-2014, 08:40 PM

Your local hardware store or Home Depot should have one. Get one that goes on a ratchet, it will make life easier.

mjposner · 01-03-2015, 04:46 PM

Pulled the seat and checked the sub. No loose wires and sub made no sound or movement at all. Nothing obvious, so will take to dealer to see what needs to be fixed.

P.S. Seat is effing heavy!

WilliamS · 01-04-2015, 12:35 PM

go to sears, but all the torx set if its still on sale, it has them all plus the reversed ones. You will need it.

The likely culprit is the speaker, but like they said could be wiring or amp as well.

12-31-2014, 06:19 AM	#1
mjposner Brigadier General 900 Rep 3,071 Posts Drives: 2020 Z4 40i Join Date: Mar 2011 Location: Southwest Florida iTrader: (3)	Passenger sub makes no sound, drivers sub working fine I always thought the balance was off on my E93 I bought in September. I finally tested and there is no sound at all coming from the sub under the passenger seat. Is it worth it to lift seat and open for lose wire or is the=is more likely an amp issue. Dealer is swamped and wants me to wait to bring in (car was in twice last month, one to fix roof, second to fix roof again (and it looks like they didn't fix correct;y so it has to go in again for that as well). __________________ Previous BMW: 16 M4, 13 M6; 14 M235i, 12 BMW M3; 11 BMW M3; 08 BMW M3; 08 BMW Z4M; 04 X3; 02 M3 Convertible; 02 M3; 00 M Roadster; 94 325 convertible; 92 325i Convertible; and 85 635csi My Car Photo Blog: http://carfisheye.blogspot.com/
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12-31-2014, 09:10 AM	#2
cdgatti Colonel 255 Rep 2,547 Posts Drives: e90 328i Join Date: May 2011 Location: KY iTrader: (4)	could be anywhere, head unit, amp or speaker connection. could even be a faulty amp.
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12-31-2014, 07:13 PM	#3
Jgio83 Enlisted Member 2 Rep 39 Posts Drives: 2011 328xi Join Date: Nov 2014 Location: New York iTrader: (0)	Check underseat first. Not hard to lift up seat. Just make sure you disconnect battery if u plan on unhooking the underseat wire harness.
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12-31-2014, 08:06 PM	#4
mjposner Brigadier General 900 Rep 3,071 Posts Drives: 2020 Z4 40i Join Date: Mar 2011 Location: Southwest Florida iTrader: (3)	Not sure I have a 50 torx lying around to lift seat.... __________________ Previous BMW: 16 M4, 13 M6; 14 M235i, 12 BMW M3; 11 BMW M3; 08 BMW M3; 08 BMW Z4M; 04 X3; 02 M3 Convertible; 02 M3; 00 M Roadster; 94 325 convertible; 92 325i Convertible; and 85 635csi My Car Photo Blog: http://carfisheye.blogspot.com/
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12-31-2014, 08:40 PM	#5
Jgio83 Enlisted Member 2 Rep 39 Posts Drives: 2011 328xi Join Date: Nov 2014 Location: New York iTrader: (0)	Your local hardware store or Home Depot should have one. Get one that goes on a ratchet, it will make life easier.
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01-03-2015, 04:46 PM	#6
mjposner Brigadier General 900 Rep 3,071 Posts Drives: 2020 Z4 40i Join Date: Mar 2011 Location: Southwest Florida iTrader: (3)	Pulled the seat and checked the sub. No loose wires and sub made no sound or movement at all. Nothing obvious, so will take to dealer to see what needs to be fixed. P.S. Seat is effing heavy! __________________ Previous BMW: 16 M4, 13 M6; 14 M235i, 12 BMW M3; 11 BMW M3; 08 BMW M3; 08 BMW Z4M; 04 X3; 02 M3 Convertible; 02 M3; 00 M Roadster; 94 325 convertible; 92 325i Convertible; and 85 635csi My Car Photo Blog: http://carfisheye.blogspot.com/
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01-04-2015, 12:35 PM	#7
WilliamS GoofBall 50 Rep 1,055 Posts Drives: 2008 E92 N54 Xdrive Join Date: Jun 2012 Location: Tampa, FL iTrader: (2)	go to sears, but all the torx set if its still on sale, it has them all plus the reversed ones. You will need it. The likely culprit is the speaker, but like they said could be wiring or amp as well.
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