135i twin turbo engine

shrekattack · 04-06-2014, 03:28 PM

Hi all, we are about to buy a 2011 135i convertible (32k miles) and I'm a little worried about the twin turbo engine. Were all or at least most of the issues with the twin turbo resolved by 2011 or do we have to expect significant maintenance and/or repair bills? -Thanks for your help!

135Pats · 04-06-2014, 03:30 PM

If it's a MY11 it is an N55, in which case it is a single twin scroll BW turbo. Not a twin setup.

The 55 is quite reliable, all in all.

TwinTurboed · 04-06-2014, 07:19 PM

Spend the extra cash and get a CPO, you will sleep better at night.

RoundelM3 · 04-07-2014, 08:30 AM

Don't get CPO - instead, buy the BMW Gold extended warranty. You'll save money and will have more items covered. The engine in the 2011 135 is indeed an N55, with slightly less tuning potential, but producing the same power as the N54 twin-turbo in stock form. The N55 has not had near the problems as the N54 with high-pressure fuel pump failures and wastegate rattle, etc.

Cookie1212 · 04-08-2014, 01:40 PM

I have a 2009 135i convertible with 87000 miles. Engine has been awesome. Had one fuel injector replaced at 45000 miles, but otherwise has been perfect!

PapaB · 04-08-2014, 10:51 PM

If the price is,right, pull the trigger. You won't regret it.

04-06-2014, 03:28 PM	#1
shrekattack New Member 0 Rep 9 Posts Drives: BMW X3 Join Date: Mar 2014 Location: Denver iTrader: (0)	135i twin turbo engine Hi all, we are about to buy a 2011 135i convertible (32k miles) and I'm a little worried about the twin turbo engine. Were all or at least most of the issues with the twin turbo resolved by 2011 or do we have to expect significant maintenance and/or repair bills? -Thanks for your help!
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04-06-2014, 03:30 PM	#2
135Pats Major General 456 Rep 6,478 Posts Drives: A few BMWs Join Date: May 2012 Location: Maryland iTrader: (3)	If it's a MY11 it is an N55, in which case it is a single twin scroll BW turbo. Not a twin setup. The 55 is quite reliable, all in all. __________________ E88 N54 Alpinweiss/Coral Red/Motiv HTA 3586r Tial .82AR/Other stuff...652WHP F30 N55 XDrive EBII
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04-06-2014, 07:19 PM	#3
TwinTurboed Turbo Power 49 Rep 364 Posts Drives: 135i Join Date: Dec 2012 Location: Somewhere iTrader: (0)	Spend the extra cash and get a CPO, you will sleep better at night. __________________ BSM 135i - CDV Delete \| Bilstein \| Eibach \| M3 FSB \| Whiteline
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04-07-2014, 08:30 AM	#4
RoundelM3 Major General 1835 Rep 6,990 Posts Drives: 15 F80 M3, 22 G01 X3 30i Join Date: Apr 2010 Location: Clayton, NC iTrader: (2) Garage List 2022 BMW X3 [9.83] 2015 BMW M3 [6.50]	Don't get CPO - instead, buy the BMW Gold extended warranty. You'll save money and will have more items covered. The engine in the 2011 135 is indeed an N55, with slightly less tuning potential, but producing the same power as the N54 twin-turbo in stock form. The N55 has not had near the problems as the N54 with high-pressure fuel pump failures and wastegate rattle, etc. __________________ 2015 F80 ///M3 Sedan 7DCT Tanzanite, 2022 X3 sDrive30i 8AT Brooklyn Grey
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04-08-2014, 01:40 PM	#5
Cookie1212 Registered 0 Rep 1 Posts Drives: 2009 135i Convertible Join Date: Apr 2014 Location: Panama City Beach FL iTrader: (0)	Not to worry I have a 2009 135i convertible with 87000 miles. Engine has been awesome. Had one fuel injector replaced at 45000 miles, but otherwise has been perfect!
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04-08-2014, 10:51 PM	#6
PapaB Private 1 Rep 72 Posts Drives: '10 135i,'07 MCoupe,'09 X6 5.0 Join Date: Jan 2011 Location: Murfreesboro, TN iTrader: (0)	If the price is,right, pull the trigger. You won't regret it.
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