BMW 1 Series Coupe Forum / 1 Series Convertible Forum (1M / tii / 135i / 128i / Coupe / Cabrio / Hatchback) (BMW E82 E88 128i 130i 135i)
 





 

Post Reply
 
Thread Tools Search this Thread
      07-26-2019, 10:51 AM   #1
Tallicia
Private First Class
Tallicia's Avatar
United_States
61
Rep
102
Posts

Drives: 135i
Join Date: Jun 2016
Location: DFW, TX

iTrader: (2)

Garage List
Question What is the reason the HPFP fails so often

Is there any details on why the HPFP fail constantly? at roughly 100k miles and over the 65k miles in the last 3 years, I expect these to fail every 15k miles. pretty much the same as ignition coils.

1. It's ridiculous.
2. They are used on 100s of thousands of N55 and N54s
3. Why has the root issue still not been found, explained?

Yet after a decade, and BMW "extending" warranty to 120k miles, it's just a still a ticking time bomb.

Does anyone have any info on why these fails so gosh darned guaranteed much and what options there are to use something that has actual appropriate service life?
__________________
Appreciate 0
      07-26-2019, 10:59 AM   #2
dtla1
Major
dtla1's Avatar
322
Rep
1,257
Posts

Drives: 2011 135i, Space Grey
Join Date: Apr 2014
Location: Silicon Valley

iTrader: (2)

Are you saying you've had to replace yours every roughly 15k miles? That doesn't sound right.
Appreciate 0
      07-26-2019, 01:35 PM   #3
JimD
Brigadier General
JimD's Avatar
299
Rep
3,459
Posts

Drives: 128i convertible
Join Date: Apr 2009
Location: Lexington, SC

iTrader: (0)

My personal theory is that any new technology is suspect for failure rate. HPFP is not really new at this point but when BMW started using it, it was pretty new. It seems like the engineers need some time to redesign the parts until they work well long term. Short term is covered by testing but it cannot reasonably be years long. I cannot prove this theory, but it is what I try to use. I stick with old technology when reasonably possible, for several years.

Cars are usually more dependable right before they are redesigned, in other words, not so much when they are introduced.
__________________
128i Convertible, MT, Alpine White, Black Top, Taupe Leatherette, Walnut, Sport
Ordered 5/22/09, Completed 6/4/09, At Port 6/9/09, On the Georgia Highway 6/13/09, Ship Arrived Charleston 6/24/09 at 10pm, PCD 7/21/09
Appreciate 0
      07-26-2019, 01:52 PM   #4
Gangplank
Colonel
Gangplank's Avatar
United_States
1230
Rep
2,637
Posts

Drives: 2011 e82 135i n55 Sprt DCT - S
Join Date: Nov 2015
Location: Port St. Lucie, FL

iTrader: (1)

Garage List
2011 135i  [0.00]
I thought it was only an issue on the N54?
__________________
2011 135i DCT | Sport pkg | PPK | Ohlins R&T swift sprigns | M3 front arms | Diff. brace | RSFB inserts.
Appreciate 0
      07-26-2019, 03:11 PM   #5
Soterios
BXR
374
Rep
476
Posts

Drives: 2012 135i
Join Date: Jun 2018
Location: Missouri

iTrader: (0)

My guess is that either engineering or cost engineering overestimated the life of that part. They expected it to be able to handle a much longer duty cycle and it just flat out fell short.
__________________
2012 135i M Sport Alpine White
Typical Boring Build
Appreciate 0
      07-26-2019, 03:19 PM   #6
The Wind Breezes
Lieutenant Colonel
The Wind Breezes's Avatar
772
Rep
1,778
Posts

Drives: 135i N55 DCT
Join Date: Apr 2015
Location: USA

iTrader: (0)

N55 does not have a HPFP issue as far as I know.

N54 was one of the first gen production direct injected gas engines. A lot of those engines had HPFP issues, not just BMW's.
Appreciate 0
      08-08-2019, 11:53 AM   #7
yeezy4me
Noob
yeezy4me's Avatar
United_States
16
Rep
99
Posts

Drives: '12 N55 135i
Join Date: Feb 2016
Location: Atlanta, GA

iTrader: (1)

My n55 hpfp was just replaced at 85K miles. But the part changed after 03/12 build date I believe, but mine was before that. Idk if the newer n55 will have issues
__________________
-- PPK tune, BMS intake, aFe air scoops, VRSF charge pipe, Mishimoto intercooler, aFe exhaust, Koni shocks, Eibach front sway bar, BMS spacers --

Appreciate 0
      08-08-2019, 12:09 PM   #8
duder13
Captain
duder13's Avatar
614
Rep
745
Posts

Drives: Cashmere
Join Date: Mar 2018
Location: US

iTrader: (0)

Quote:
Originally Posted by yeezy4me View Post
My n55 hpfp was just replaced at 85K miles. But the part changed after 03/12 build date I believe, but mine was before that. Idk if the newer n55 will have issues
Yeah, the pump changed on 3/12 and after cars, and I also don't know about failure rates with the newer pumps. My car car was built 5/11, so I expect mine to go at some point (only have 46K miles, though.)

N55 engines themselves are well built, but replacing auxiliary parts, like the waterpump, OFHG, and HPFP, is a just a part of living with the 135i, especially with a tune. I had two of the three go in the past year.


HPFP:

Appreciate 0
      08-24-2019, 10:52 AM   #9
Tallicia
Private First Class
Tallicia's Avatar
United_States
61
Rep
102
Posts

Drives: 135i
Join Date: Jun 2016
Location: DFW, TX

iTrader: (2)

Garage List
ugh, that's the vaccuum pump.

On the HPFP having disassembled all of them, mechanically, they seem fine.

Now there is the electric solenoid on the HPFP,, and BMW solenoids and electric motors/vanos/valvetronic, etc tend to have life of about the warranty, no more.

So I am looking to see if a proper high quality solenoid is the real root issue, related to duty cycles and it just being absolute bare minimum as per bmw standards.

Also there are a few gaskets, two which are just "external" basically keeping the motor oil inside the pump, which are not likley, and the 3 on the solenoid which controls the fuel into the high pressure fuel rail, or returns it to inlet.

Having a new solenoid and gasket kit for these would be ideal, to help determine if these are it, or if it's truly one of the 3 pumps, which even those are easily replaceable.
__________________
Appreciate 0
      08-24-2019, 10:53 AM   #10
Tallicia
Private First Class
Tallicia's Avatar
United_States
61
Rep
102
Posts

Drives: 135i
Join Date: Jun 2016
Location: DFW, TX

iTrader: (2)

Garage List
side note on the 3rd diagram the HPFP is marked 5, and it's a unit but consists of the front offset/slanted spinning pump/oscillating plate, the 3 pump cylinders, the electric solenoid, and the gaskets and handful of bolts holding it together.

it's a pretty simple piece all together.
__________________
Appreciate 0
Post Reply

Bookmarks

Tags
hpfp, n54, n55

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -5. The time now is 12:49 AM.




1addicts
Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2019, vBulletin Solutions Inc.
1Addicts.com, BIMMERPOST.com, E90Post.com, F30Post.com, M3Post.com, ZPost.com, 5Post.com, 6Post.com, 7Post.com, XBimmers.com logo and trademark are properties of BIMMERPOST