looking at 335d's...looking for answers to FAQ

Persian Whisperjet · 10-25-2018, 02:25 PM

Recurring glow plug failure is often traced to a faulty thermostat. Easy fix I got an OEM one for $25.

Persian Whisperjet · 10-25-2018, 03:06 PM

At a minimum I would tune out the EGR and SCR systems. Better yet, tune them out and toss the EGR in the trash and replace with an AARodriguez racepipe, which will free up a lot of space. These changes plus a couple of other routine items (principally harmonic balancer, engine mounts, and vacuum hoses) will head off CBU and mitigate probably 75 percent of your reliability problems.

DougNBodie · 11-13-2018, 07:12 PM

2011 335d with 62,000 miles on her.

1) Carbon build-up aka "CBU" - Not Yet
1a) Injectors go bad,-----Not Yet
2) Harmonic balancing pulley - Replaced at 55,000 miles
3) SCR mixer and related codes-----Not Yet
4) driveshaft guibo-------Not Yet
5) Transmission filter and fluid should have been serviced every 50K---Basic car care
6) Vacuum lines need replacing------Not Yet
7) thermostat tends to fail open after 5+ years------Not Yet
8) Urea tank issues-------Not Yet

I have just changed the oil and tried to never push the car to much before driving about 8 miles......Turbo's like to get warmed up before use.

This D has been a great car.

Pep423 · 11-18-2018, 11:32 PM

2011 w 61000
Purchased in Apr 2015 with 23,900 miles

All below replaced by me

TPMS module
Glow plug module
MAF
EGR cooler
Thermostat (because I was already in the area)
Red boost charge pipe
Car is currently at BMW to diagnose a strange noise from engine area for which I couldn't figure out.

Under warranty
NOx sensor (original owner)

Recalls
HVAC blower motor
SCR/UREA
Battery cable

I was expecting it to have issues but not all of these. Luckily I was able to do a lot of the work myself. If I could do it again I likely would not buy this car.

Car has a Renntech tune but all issues except boost pipe occurred before tune.

fre1102 · 12-07-2018, 04:01 PM

Quote:

Originally Posted by Pep423

2011 w 61000
Purchased in Apr 2015 with 23,900 miles

All below replaced by me

TPMS module
Glow plug module
MAF
EGR cooler
Thermostat (because I was already in the area)
Red boost charge pipe
Car is currently at BMW to diagnose a strange noise from engine area for which I couldn't figure out.

Under warranty
NOx sensor (original owner)

Recalls
HVAC blower motor
SCR/UREA
Battery cable

I was expecting it to have issues but not all of these. Luckily I was able to do a lot of the work myself. If I could do it again I likely would not buy this car.

Car has a Renntech tune but all issues except boost pipe occurred before tune.

I'm looking for a 335D--let me know if you decide to sell it.

Pep423 · 12-07-2018, 04:04 PM

Quote:

Originally Posted by fre1102

Quote:

Originally Posted by Pep423

2011 w 61000
Purchased in Apr 2015 with 23,900 miles

All below replaced by me

TPMS module
Glow plug module
MAF
EGR cooler
Thermostat (because I was already in the area)
Red boost charge pipe
Car is currently at BMW to diagnose a strange noise from engine area for which I couldn't figure out.

Under warranty
NOx sensor (original owner)

Recalls
HVAC blower motor
SCR/UREA
Battery cable

I was expecting it to have issues but not all of these. Luckily I was able to do a lot of the work myself. If I could do it again I likely would not buy this car.

Car has a Renntech tune but all issues except boost pipe occurred before tune.

I'm looking for a 335D--let me know if you decide to sell it.

Haha, what timing! I'm planning on trading it in as soon as tmrw.

However, I just got it back from the dealer. They think I may have something going on in the crankcase. Either a rod or main bearing but they didn't open up to confirm.

apexit4 · 12-10-2018, 12:05 PM

Quote:

Originally Posted by Pep423

Haha, what timing! I'm planning on trading it in as soon as tmrw.

However, I just got it back from the dealer. They think I may have something going on in the crankcase. Either a rod or main bearing but they didn't open up to confirm.

I've been seeing more and more people comment about potential bearing issues. Wonder if its a coincidence or a pattern...

DougNBodie · 12-12-2018, 06:37 PM

BMW upped the warranty to 100,000 miles on the Turbo, NOx, injectors (pretty sure), catalytic converter and I think the inter-cooler.
Must do's: Never (try not to) push the Turbo's until you have driven the car for about 7 or 8 miles and either do a JBD or remap.... Dont go over 350 Hp and 500 lbs of torque with out doing brakes and rear differential. Last thing if you can....just a suggestion. Try to get a M Sport, doesn't have a heated steering wheel but there are only about 650 left on the road in America.

Jujuchua · 07-14-2021, 02:00 PM

I gotta dbs face star off assist and now a check engine light on. Before that it was amazing

335d_go_wow · 08-21-2021, 03:58 PM

2010 335d w/ 137k miles
(purchased from my cousin back in 2019 with 126k miles)

What a pure bliss to drive, best car I've ever owned, so much fun that I don't entirely begrudge spending the money on maintenance because I know how much fun I'll get from it on the other side.

Replaced the front struts (~$700), but my cousin told me that going into it.

It already had a NOx sensor code when I got it from my cousin but I wiped it and did a drive cycle and still passed smog in CA. Over the two years I've owned it the NOx sensor codes worsened. Quote from Indy shop for $1,600 or about $1,000 if I do it myself. At this point it's the right time to sell it because we're ditching the apartment and going to try the vanlife for a year or two and don't want to store the 335d.

Besides that I've really only had to replace the front left wheel speed sensor which was easily done myself for like $40 for the part.

I absolutely recommend the car, just also budget something reasonable for annual maintenance.

10-25-2018, 02:25 PM	#23
Persian Whisperjet Kind of a Big Deal 171 Rep 857 Posts Drives: 2011 335d Join Date: Dec 2012 Location: Washington, D.C. iTrader: (0)	Recurring glow plug failure is often traced to a faulty thermostat. Easy fix I got an OEM one for $25. __________________
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10-25-2018, 03:06 PM	#24
Persian Whisperjet Kind of a Big Deal 171 Rep 857 Posts Drives: 2011 335d Join Date: Dec 2012 Location: Washington, D.C. iTrader: (0)	At a minimum I would tune out the EGR and SCR systems. Better yet, tune them out and toss the EGR in the trash and replace with an AARodriguez racepipe, which will free up a lot of space. These changes plus a couple of other routine items (principally harmonic balancer, engine mounts, and vacuum hoses) will head off CBU and mitigate probably 75 percent of your reliability problems. __________________
	Appreciate 0 Quote

11-13-2018, 07:12 PM	#25
DougNBodie Private 27 Rep 92 Posts Drives: BMW 335d M Sport Join Date: Aug 2017 Location: Orange County , CA. iTrader: (0) Garage List 2011 BMW 335d [10.00]	2011 335d with 62,000 miles on her. 1) Carbon build-up aka "CBU" - Not Yet 1a) Injectors go bad,-----Not Yet 2) Harmonic balancing pulley - Replaced at 55,000 miles 3) SCR mixer and related codes-----Not Yet 4) driveshaft guibo-------Not Yet 5) Transmission filter and fluid should have been serviced every 50K---Basic car care 6) Vacuum lines need replacing------Not Yet 7) thermostat tends to fail open after 5+ years------Not Yet 8) Urea tank issues-------Not Yet I have just changed the oil and tried to never push the car to much before driving about 8 miles......Turbo's like to get warmed up before use. This D has been a great car.
	Appreciate 1 EricKim3.50 Quote

11-18-2018, 11:32 PM	#26
Pep423 Private 5 Rep 69 Posts Drives: 2011 335d M-Sport Join Date: Dec 2015 Location: Chi Burbs iTrader: (0)	2011 w 61000 Purchased in Apr 2015 with 23,900 miles All below replaced by me TPMS module Glow plug module MAF EGR cooler Thermostat (because I was already in the area) Red boost charge pipe Car is currently at BMW to diagnose a strange noise from engine area for which I couldn't figure out. Under warranty NOx sensor (original owner) Recalls HVAC blower motor SCR/UREA Battery cable I was expecting it to have issues but not all of these. Luckily I was able to do a lot of the work myself. If I could do it again I likely would not buy this car. Car has a Renntech tune but all issues except boost pipe occurred before tune.
	Appreciate 0 Quote

12-12-2018, 06:37 PM	#30
DougNBodie Private 27 Rep 92 Posts Drives: BMW 335d M Sport Join Date: Aug 2017 Location: Orange County , CA. iTrader: (0) Garage List 2011 BMW 335d [10.00]	BMW upped the warranty to 100,000 miles on the Turbo, NOx, injectors (pretty sure), catalytic converter and I think the inter-cooler. Must do's: Never (try not to) push the Turbo's until you have driven the car for about 7 or 8 miles and either do a JBD or remap.... Dont go over 350 Hp and 500 lbs of torque with out doing brakes and rear differential. Last thing if you can....just a suggestion. Try to get a M Sport, doesn't have a heated steering wheel but there are only about 650 left on the road in America. Last edited by DougNBodie; 12-12-2018 at 06:52 PM..
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07-14-2021, 02:00 PM	#31
Jujuchua New Member 0 Rep 8 Posts Drives: 2011 335d Join Date: Jul 2021 Location: US iTrader: (0)	I gotta dbs face star off assist and now a check engine light on. Before that it was amazing
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08-21-2021, 03:58 PM	#32
335d_go_wow New Member 0 Rep 7 Posts Drives: 2010 335d Join Date: Aug 2021 Location: San Francisco, CA iTrader: (0)	2010 335d w/ 137k miles (purchased from my cousin back in 2019 with 126k miles) What a pure bliss to drive, best car I've ever owned, so much fun that I don't entirely begrudge spending the money on maintenance because I know how much fun I'll get from it on the other side. Replaced the front struts (~$700), but my cousin told me that going into it. It already had a NOx sensor code when I got it from my cousin but I wiped it and did a drive cycle and still passed smog in CA. Over the two years I've owned it the NOx sensor codes worsened. Quote from Indy shop for $1,600 or about $1,000 if I do it myself. At this point it's the right time to sell it because we're ditching the apartment and going to try the vanlife for a year or two and don't want to store the 335d. Besides that I've really only had to replace the front left wheel speed sensor which was easily done myself for like $40 for the part. I absolutely recommend the car, just also budget something reasonable for annual maintenance.
	Appreciate 0 Quote