What is beneath the rear passenger seat?

Soul_Glo · 10-02-2015, 12:32 AM

I know the low pressure fuel pump assembly is there somewhere for one... but is it on the rear passenger side? The reason I ask is whenever I have a passenger sat there... I can smell fuel! The smell usually goes away after a good five minutes but it is strong to the point that I need to ventilate by opening windows...

I have ordered some dye and a UV light... I think there may be a leak somewhere and this could explain why I have used 1/2 of fuel in 5 days rather than 1/4... no change in driving style, no air con on, tyre pressures spot on, traffic free journeying...

Or could it be evap related? No codes... but I remember when my evap went on my S3 and I replaced it after 6 years at 64,000 miles. Well my N52B25 is now 8 years and near 80,000 miles.

Thanks

Phil325i · 10-02-2015, 02:38 AM

The low pressure fuel pump controller is mounted behind the o/s rear seat. The access cover to the petrol tanks is under the rear seat. Sounds like your fuel pump/sender unit may be leaking where it fits into the tank.

Ao1 · 10-02-2015, 02:56 AM

Personally I would not drive the car until it is sorted out. Seriously, you are taking a massive risk driving the car in that condition. Your phone could cause fuel vapour to ignite. Your cloths could cause a static charge. Wiring, the list goes on. Do yourself a favour and don’t drive it.

AWSAWS · 10-02-2015, 05:15 AM

Yes you want to be sure this is sealed properly! Otherwise a spark\naked flame could cause the whole cabin to ignite like a cylinder! Plus your seats may be soaked in petrol

Check out a video entitled "NOS Leak Causes Flash Fire Inside Car When Passenger Lights a Cigarette"

Aragorn30d · 10-02-2015, 06:18 AM

Get the rear seat out and have a look!

Soul_Glo · 10-11-2015, 07:19 AM

Fuel sender replaced. Thank you.

10-02-2015, 12:32 AM	#1
Soul_Glo Major General 13398 Rep 7,484 Posts Drives: G20 Join Date: May 2013 Location: Manhattan, NYC iTrader: (1)	What is beneath the rear passenger seat? I know the low pressure fuel pump assembly is there somewhere for one... but is it on the rear passenger side? The reason I ask is whenever I have a passenger sat there... I can smell fuel! The smell usually goes away after a good five minutes but it is strong to the point that I need to ventilate by opening windows... I have ordered some dye and a UV light... I think there may be a leak somewhere and this could explain why I have used 1/2 of fuel in 5 days rather than 1/4... no change in driving style, no air con on, tyre pressures spot on, traffic free journeying... Or could it be evap related? No codes... but I remember when my evap went on my S3 and I replaced it after 6 years at 64,000 miles. Well my N52B25 is now 8 years and near 80,000 miles. Thanks
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10-02-2015, 02:38 AM	#2
Phil325i Brigadier General 624 Rep 3,201 Posts Drives: E92 325i MSport Coupe Join Date: Apr 2012 Location: UK South East iTrader: (1) Garage List 2009 BMW 325i Coupe [6.00]	The low pressure fuel pump controller is mounted behind the o/s rear seat. The access cover to the petrol tanks is under the rear seat. Sounds like your fuel pump/sender unit may be leaking where it fits into the tank. __________________ E92 pre-LCI 325i - Ohlins R&T; H&R spacers; M3 strut brace; Swift thrust sheets; 3 x chassis braces; diff brace; N53 V-brace; 034 subframe inserts; BMS clutch stop; BMS CDV; RE g/box mounts; Delrin shift bushes; Saikoumichi OCC; Cyba scoops; BMW Perf Exhaust; HEL s/steel brake hoses; M3 rear spoiler; Recaro Sportster CSs; M3 white dash LEDs; LED Angels; LED side repeaters; BMW Perf black grille; CSL reps; SSDD carbon diffuser; Monster Wrap black roof/clear front
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10-02-2015, 02:56 AM	#3
Ao1 Captain 123 Rep 604 Posts Drives: E92 M3 Join Date: Dec 2013 Location: England iTrader: (3)	Personally I would not drive the car until it is sorted out. Seriously, you are taking a massive risk driving the car in that condition. Your phone could cause fuel vapour to ignite. Your cloths could cause a static charge. Wiring, the list goes on. Do yourself a favour and don’t drive it.
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10-02-2015, 05:15 AM	#4
AWSAWS Colonel 283 Rep 2,343 Posts Drives: E92 GC Turbos, FBO, 335i DCT Join Date: Nov 2012 Location: Valhalla iTrader: (0)	Yes you want to be sure this is sealed properly! Otherwise a spark\naked flame could cause the whole cabin to ignite like a cylinder! Plus your seats may be soaked in petrol Check out a video entitled "NOS Leak Causes Flash Fire Inside Car When Passenger Lights a Cigarette" __________________ GC Turbos, FBO, JB4, DCT, Port Meth injection, BMS Charge Pipe, NGK plugs. EBC brakes and pads, LED Angel lights, LED foglights, LCI rears OCC, Braided brake lines. Custom Diff Lockdown Kit, VTT inlets, TMAP, stage 2+ fuel pump 11.79@119mph (stock turbos) 11.74@129mph (GC Turbos)
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10-02-2015, 06:18 AM	#5
Aragorn30d Lieutenant Colonel 175 Rep 1,596 Posts Drives: E90 330d Join Date: Mar 2015 Location: Fife iTrader: (0)	Get the rear seat out and have a look!
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10-11-2015, 07:19 AM	#6
Soul_Glo Major General 13398 Rep 7,484 Posts Drives: G20 Join Date: May 2013 Location: Manhattan, NYC iTrader: (1)	Fuel sender replaced. Thank you.
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