|
|
|
|
PLEASE HELP SUPPORT E90POST BY DOING YOUR TIRERACK SHOPPING FROM THIS BANNER, THANKS! |
|
BMW Garage | BMW Meets | Register | Today's Posts | Search |
|
BMW 3-Series (E90 E92) Forum
>
Tire Pressure Problem on "Run-Flats"!!
|
|
Wheels and Tires forum Sponsored by The Tire Rack
Please help to directly support e90post by doing your tirerack shopping from the above link. For every sale made through the link, e90post gets sponsor support to keep the site alive. Disclaimer |
|
Thread Tools | Search this Thread |
04-23-2006, 11:25 AM | #1 |
Mach 1 in a BMW
9
Rep 94
Posts
Drives: 2019 BMW X3 M40i
Join Date: Apr 2005
Location: SoCal
|
Tire Pressure Problem on "Run-Flats"!!
Since I couldn't find any any other threads on this issue and the car's been out for a year now this may be a unique problem. However, 3 times in the last 2 mos. I have found the rear tire pressures down to almost "zip" and NO "Pressure Warning"alert!!!
1st time LR: 9 lbs., RR: 10 lbs.; 2nd time LR 11 lbs., RR: 8 lbs.; 3rd time (today): LR: 11 lbs., RR: 15 lbs. Front tire pressures ok. Here's the Facts: E90 330i Delivered on May 5, 2005 (1st of this whole group I believe) Sport Pkg. (Bridgestone run-flats) Milage: 10,380 mi. Maintained Tire Press: Front - 32 psi; Rear - 36 psi. (As per manual) No nail/screw holes, no cuts, no bead or rim damage. No indication that anyone has messed with the tires (No dust smudges on stem caps - I powdered these to check for tampering) What the hell is goin' on?? The big problem here is that you can drive on these run-flats virtualy without ANY pressure and unless you get into serious cornering, never know it, unless the "Pressure Alert" light comes on. Those of you around here for the original e90 roll-out may recall that BMW had it's dealers drive these cars in the intro affair with NO (0 psi) air in the rear tires on an autocross course. NO ONE ever realized that their was anything wrong with the car after running the course! Any ideas Bimmer Heads??? |
04-24-2006, 01:33 AM | #3 |
Major
38
Rep 1,238
Posts |
It's not about initializing the system. Both his rear tires are loosing pressure myteriously presumably measured by a tire pressure metre. Well.. the air some how did escape so I think it must be two defective tires at the rear.
|
Appreciate
0
|
04-24-2006, 09:04 AM | #4 |
Private First Class
5
Rep 127
Posts |
Obviously there is a problem with the tires/rims or the manner in which they were mounted. I'm suggesting that the lack of warning might be due to improper system initialization.
|
Appreciate
0
|
04-27-2006, 04:46 PM | #5 |
Colonel
119
Rep 2,909
Posts |
There is a lot of members (myself included) who've noticed that the RFT's tend to lose air a bit quicker than traditional tires. My pressure seaped down to about 19 one time, and it was only about a month since I had last checked them.
|
Appreciate
0
|
04-27-2006, 05:23 PM | #6 | |
MAUI BUILT
485
Rep 7,781
Posts
Drives: 2006 330i MT
Join Date: Jun 2005
Location: NORCAL
|
Quote:
Danny
__________________
Arctic/Blk Leather/Alum.Trim/MT/ZSP/Sunshades/Blk Lines/M3 Illuminated Knob/Alcantara Performance Wheel/M-E-Brake Handle/Euro Fog Switch/Koni Yellows/H&R Sport Springs/19" VMR V718's w/PS2 Tires/M-Tech Body Kit/Carbon Fiber Spoiler/Bimmian Interior Bulbs/OEM Eye Glass Tray/SSK/Alcantara Boot/Split Armrest/OEM Dual Rear Power Outlets/Rear Ashtray Delete/OEM Alum. Pedals/Osram 6000K/Brex Rings/LED Side Markers/BMS Power Box
|
|
Appreciate
0
|
04-27-2006, 07:30 PM | #7 |
Lieutenant
12
Rep 409
Posts |
I have it on my rear passenger tire. I have to had about 5-10 psi about once a month. All the other tires stay the same PSI all the time.
Go figure..... one of these days i'll have someone look at it but until then I just keep topping it off everytime it gives me the warning. Jesse |
Appreciate
0
|
08-02-2010, 09:48 PM | #8 | |
Second Lieutenant
11
Rep 273
Posts |
Quote:
|
|
Appreciate
0
|
08-02-2010, 11:53 PM | #9 |
Freight Dawg
104
Rep 2,103
Posts |
Wow I've never even heard of this problem. I ran three sets of runflats (2 pirelli and 1 bridgestone) and the only time they leaked is when there was a nail in one of them or I had a cracked wheel.
__________________
--Marcelo
'06 Arctic Metallic 325i | Sport Package | 6MT | Dinan Stage III suspension | Dinan exhaust | 330i manifold swap! Click here! | Active Autowerke tune | 135i Brake Calipers | Deiselboost caliper brackets | E46 M3 front rotors |
Appreciate
0
|
08-03-2010, 06:34 AM | #10 |
No 55mph
1621
Rep 8,476
Posts |
Don't know about the tire problem, but don't the TPMS sending units on wheels have batteries?
If yours use the batteries, I understand that the lithium batteries mounted in the sensors have a 5-6 year shelf life - which would put them at the end of their useful life if your car is 2005...
__________________
F32 435ix//MGM//M Sport-Prem-Tech-Driver Assist-Lighting-Cold Weather-Dyn Handling Pkgs//M4 Black Lthr Int w/M4 Alum Blade Trim//HK w/Bavsound Stg3//763M//M4 Euro LCI Tails//M4 Mirrors w/CF Covers//AWCarbon CF F/R Spoilers-Side Splitters-Diffuser 6WB/ID6 HU+HUD/IND M4 Alcantara Armrest//PURE S2 Turbo//AA FMIC+DP//ER CP+TIC//3.5bar TMAP/TS DV//AWE Tuning Exh w/Blk Tips//Turner MS CF Intake//BM3 Cary Jordan Tune//MPerf Diff//PrecRW Ignition Kit
|
Appreciate
0
|
Bookmarks |
|
|