[Viffermike]

NOTE: the issue described below has been figured out. Please see this thread for the explanation.

As initially discovered in this thread, there seems to be a bit of a mystery regarding what optioning triggers the inclusion of a second auxiliary coolant radiator on the driver's side of many F22s with M Sport bodywork, including both the 228i and the M235i.

Background: I have a 2015 228i M Sport, 3/15 build, staggered run-flats and no THP. A friend of mine also has a 2015 228i M Sport, 3/15 build -- his VIN is only 14 higher than mine, meaning the car was likely built the same day as mine -- but he has the THP with standard staggered Michelin PSS tires.

My car does not have the extra radiator. His car does.

At first we thought it had to be an unmentioned part of the THP. But we both have seen 228is with THP and no driver's side aux radiator. Remember that the 228i can be ordered with the THP in Sport Line trim, which has fog lights in place of the left and right valence intakes. In fact, he's all but certain that he's seen M235is -- which come standard with all of the 228i THP trappings -- without the aux radiator. So this oddity may not even be limited to the N20 engine.

So here's what we know:
- The easiest way to tell if an F22 has the driver's side aux radiator is if the driver's-side (left) front valence intake is open. If it is, you will see the radiator behind it, and there will be a grate in the left front wheel well to let air pass through.
- All F22s with M Sport bodywork have an aux radiator on the passenger (right) side; the right intake is open, and a wheel well grate is present. The driver's side aux radiator is essentially a mirror of the passenger-side setup.
- If the driver's side (left) front intake is solid plastic and there is no left-front wheel well grate, the car does not have the second aux radiator. The space behind the blocked-off intake is totally void.
- The inclusion of the second aux radiator requires at least three large unique parts: the radiator, an open left-front intake grate, and a left-front wheel well moulding piece that includes an open grate (it is not blocked off with a removable panel on cars without the radiator; the area is solid plastic).

What we need to figure out is why some F22s get the second aux radiator and why others don't. It's not dependent on the THP, the M Sport option, or even the N20 engine, apparently. We don't think it has anything to do with SULEV certification. It plainly has nothing to do with tire or wheel selection. IIRC, all North American F22s are outfitted with BMW's hot-climate cooling package, so that's not it. So far, the evidence points to the radiator's inclusion being totally arbitrary, at least on 2015 M Sport-bodied cars.

Any ideas or insight from anyone? Should we start taking a roll call of who does and doesn't have the second radiator (with model, model year, build month, trim level, and factory mechanical options like THP noted)?

(or, in a nutshell: WTF, BMW?)

[huma]

Could you take pictures to show us the differences?

[uberspeed]

Originally Posted by huma

Could you take pictures to show us the differences?

Refer to the thread he linked for pics.

Thanks for starting this to collect info OP!

[mfourn20]

My build:
2014 228i M Sport
Estoril Blue
Premium Package
Tech package
Cold weather
HK Sound
Bridgestone summer only runflats

I have BOTH auxiliary radiators.

[Zooks527]

Originally Posted by Viffermike

(or, in a nutshell: WTF, BMW?)

If history is any guide, it may well be a function of the speed rating on the tires shipped from the factory.

Cars with high-speed synchronization 840 get an extra radiator per realoem.com: http://www.realoem.com/bmw/showparts...49&hg=17&fg=05

Lots of people went through a variant of this with the E90 series 335. In the past, if you picked a tire option that doesn't have a high enough speed rating, BMW sets the top speed limit on the car at 130 mph and doesn't include the "840" high speed option. If you picked an option with high speed rated tires, the top speed limit goes to 155 and the car gets the extra radiator. This may be a subset funtion of the same process.

Look at the speed rating on the tires on your car and on your friend's. What's the rating on each? Or, look on your Mulroney stickers. Does one have "840" listed in the options and the other not?

[Glassjaw047]

Originally Posted by Zooks527

If history is any guide, it may well be a function of the speed rating on the tires shipped from the factory.

Cars with high-speed synchronization 840 get an extra radiator per realoem.com: http://www.realoem.com/bmw/showparts...49&hg=17&fg=05

Lots of people went through a variant of this with the E90 series 335. In the past, if you picked a tire option that doesn't have a high enough speed rating, BMW sets the top speed limit on the car at 130 mph and doesn't include the "840" high speed option. If you picked an option with high speed rated tires, the top speed limit goes to 155 and the car gets the extra radiator. This may be a subset funtion of the same process.

Look at the speed rating on the tires on your car and on your friend's. What's the rating on each? Or, look on your Mulroney stickers. Does one have "840" listed in the options and the other not?

Definitely not the case here. I have a 14' M235i RWD and opted for the All Season Performance Run Flats w/ limiter to 130 mph since I am in the Northeast and have both Passenger & Driver Aux Radiators with open grates on the front.

I checked out the link from the other thread showing the picture but want to see a picture of it not being there...

[tccox]

2014 228 Msport, Manual, Standard MSport Suspension. I have both radiators/Coolers.

[todd hollander]

Well, I have an M235i with the Michelin PSS tires with the higher speed rating and I don't have the extra radiator on the drivers side. Maybe they are not putting them on the convertibles? You can clearly see the radiator on the passenger's side but the drivers side is blocked out.

[Thescout13]

Originally Posted by Zooks527

If history is any guide, it may well be a function of the speed rating on the tires shipped from the factory.

Cars with high-speed synchronization 840 get an extra radiator per realoem.com: http://www.realoem.com/bmw/showparts...49&hg=17&fg=05

Lots of people went through a variant of this with the E90 series 335. In the past, if you picked a tire option that doesn't have a high enough speed rating, BMW sets the top speed limit on the car at 130 mph and doesn't include the "840" high speed option. If you picked an option with high speed rated tires, the top speed limit goes to 155 and the car gets the extra radiator. This may be a subset funtion of the same process.

Look at the speed rating on the tires on your car and on your friend's. What's the rating on each? Or, look on your Mulroney stickers. Does one have "840" listed in the options and the other not?

I have the higher speed synch (so top speed of 155) and I don't have the second radiator... So... I don't think that's it

[scrape1]

My configuration per VIN decoder.
2014, lighting, premium, m-sport, all season
I have both auxiliary radiators.

--------------------------------------------------------
Model description: 228i
Market: USA
Type: 1F53
E-Code: F22
Chassis: Coupé
Steering: links
Doors: 2
Engine: N20B20O0 - 2,00l (180kW)
Drive: Heckantrieb
Transmission: manuell
Body Color: Alpinweiss 3 (300)
Upholstery: Leder Dakota/korallrot/akzent Schwa (LCL5)
Production date: 01.04.2014
Assembled in: Leipzig

Code Serienausstattung Standard Equipment
S1CBA
CO2 Umfang CO2 package
S216A
Servolenkung-Servotronic HYDRO STEERING-SERVOTRONIC
S249A
Multifunktion für Lenkrad Multifunction f steering wheel
S258A
Bereifung mit Notlaufeigenschaften Tire with run-flat functionality
S4AEA
Armauflage vorn verschiebbar Armrest front, retractable
S4NEA
Blow-By Heizer Blow-by heater
S544A
Geschwindigkeitsregelung mit Bremsfunkt. Cruise control with brake function
S5DCA
Kopfstützen im Fond klappbar Rear-seat headrests, folding
S5DSA
Notentriegelung Kofferraum Emergency release, luggage compartment
S645A
BMW US Radio BMW US Radio
S663A
Radio BMW Professional Radio BMW Professional
S823A
Heissland-Ausführung Hot-climate version
S845A
Akustische Gurtwarnung Acoustic belt warning
S853A
Sprachversion englisch Language version English
S992A
Steuerung Kennzeichenbefestigung Control of number-plate attachment
S993A
Modelljahrescode in FG-Nummer model year code in VIN
Code Sonderausstattung Optional Equipment
S1CAA
Selektion COP relevanter Fahrzeuge Selection of COP relevant vehicles
S2TSA
BMW LM Rad M Doppelspeiche 461
S2VBA
Reifendruckanzeige Tyre pressure control (TPC)
S319A
Integrierte Universal-Fernbedienung Integrated universal remote control
S322A
Komfortzugang Comfort access
P337A
M Sportpaket M Sports package
S3DZA
Entfall Zusatz-Schriftzug aussen Delete extra external lettering
S403A
Glasdach elektrisch Glass roof, electrical
S423A
Fussmatten Velours Floor mats, velours
S430A
Innen-/Aussensp. mit Abblendautomatik Interior/outside mirror with auto dip
S431A
Innenspiegel automatisch abblendend Interior mirror with automatic-dip
S441A
Raucherpaket Smoker package
S459A
Sitzverstellung elektrisch mit Memory Seat adjuster, electric, with memory
S481A
Sportsitz Sports seat
S488A
Lordosenstütze Fahrer u. Beifahrer Lumbar support, driver and passenger
S493A
Ablagenpaket Storage compartment package
S4ADA
Interieurleisten Alu Längsschliff fein Interior trim strips, alu, brushed, fine
S4DLA
Akzentleisten schwarz hochglänzend Accent strips, black, high-gloss
S521A
Regensensor Rain sensor
S522A
Xenon-Licht Xenon Light
S524A
Adaptives Kurvenlicht Adaptive Headlights
S534A
Klimaautomatik Automatic air conditioning
S563A
Lichtpaket Light package
S655A
Satellitentuner Satellite tuner
S676A
HiFi Lautsprechersystem HiFi speaker system
S697A
Area-Code 1 für DVD Area-Code 1 for DVD
S6ACA
Intelligenter Notruf Intelligent emergency call
S6AEA
TeleServices TeleServices
S6NHA
Freisprecheinr. mit USB-Schnittstelle Hands-free with USB interface
S6VBA
CCC Zusteuerung CCC allocation
S704A
M Sportfahrwerk M Sports suspension
S710A
M Lederlenkrad M leather steering wheel
S715A
M Aerodynamikpaket M Aerodynamics package
S754A
M Heckspoiler M Rear spoiler
S760A
Hochglanz Shadow-Line High gloss shadow line
S775A
Dachhimmel anthrazit Headlining anthracite
S8KLA
Ölwartungsintervall 15.000 km/12 Monate
S8S4A
Decodierung variable Lichtverteilung Decoding variable light distribution
S8TMA
Tagfahrlicht bei Fahrzeugstart inaktiv
S8TNA
Tagfahrlicht über Lichtmenü
S925A
Versandschutzpaket Transport protection package
S9AAA
Aussenhautschutz Outer skin protection

[Killramos]

2014 BMW M235i Canada. ZF8, near fully loaded. Arrived at dealer last march 2014 for timing. MPSS tires.

I have both radiators with open vents.

My bumper does not have headlight washers as a note ( maybe this could be affecting things?)

[ckfraser]

'14 M235i, Canada. ZF8, MR paint, everything else is base. I've got both radiators.

[Viffermike]

Originally Posted by scrape1

My configuration per VIN decoder.
2014, lighting, premium, m-sport, all season
I have both auxiliary radiators.

--------------------------------------------------------
Model description: 228i
Market: USA
Type: 1F53
E-Code: F22
Chassis: Coupé
Steering: links
Doors: 2
Engine: N20B20O0 - 2,00l (180kW)
Drive: Heckantrieb
Transmission: manuell
Body Color: Alpinweiss 3 (300)
Upholstery: Leder Dakota/korallrot/akzent Schwa (LCL5)
Production date: 01.04.2014
Assembled in: Leipzig

Scrape1, this is handy. I only see two options in this list that could possibly indicate the extra radiator:
1). Blow-By Heizer Blow-by heater
S544A
Is this second radiator the "Blow-by heater"?
2). Heissland-Ausführung Hot-climate version
S845A
All NA cars should have this standard. But maybe that's not the case with F22s?

So this is definitely something that affects both 228is and M235is. It's not engine- or model-dependent.

[overcoil]

Just thinking out loud, so the smaller radiator can be for either; oil cooler, transmission cooler, engine coolant, turbo cooling or A/C

Reasons they may want to relocate to some remote cooling, xenon headlamp create to much heat for A/C components?

Could they be mounting an auxiliary trans radiator for manusl transmissions down low?

Do any automatic transmission cars have the left hand side small radiator?

Do all the cars use same A/C model, would they source componets for the same model from different suppliers?

[Viffermike]

Originally Posted by Killramos

2014 BMW M235i Canada. ZF8, near fully loaded. Arrived at dealer last march 2014 for timing. MPSS tires.

I have both radiators with open vents.

My bumper does not have headlight washers as a note ( maybe this could be affecting things?)

This is interesting. On my car, which has the Cold Weather Package, each corner has a plastic tunnel that leads from the wheel well to the front bumper area; there's an access panel to each in the corresponding wheel well right next to where the wheel well grate is/should be. My thought is that it's a routing tunnel to carry washer/parking sensor tubing and wiring. Two thoughts:

1). I wonder if cars without the CWP (Cold Weather Package) have these tunnels?

And the big one:
2). I also wonder if those who order the CWP have S845A (Hot-climate version) deleted?

So we all need to include an extra detail:
- Does your car have the CWP (Cold Weather Package)?

[Viffermike]

Originally Posted by ScottSinger

Just thinking out loud, so the smaller radiator can be for either; oil cooler, transmission cooler, engine coolant, turbo cooling or A/C

Reasons they may want to relocate to some remote cooling, xenon headlamp create to much heat for A/C components?

Could they be mounting an auxiliary trans radiator for manusl transmissions down low?

Do any automatic transmission cars have the left hand side small radiator?

Do all the cars use same A/C model, would they source componets for the same model from different suppliers?

I have the Lighting Package, ScottSinger, so that's definitely not it.

It's not a manual/auto issue, either. The second radiator is definitely coolant of some sort. My buddy's M Sport with the THP is an auto just like mine. He's got the extra radiator. I don't.

[akuan99]

Originally Posted by Viffermike

And the big one:
2). I also wonder if those who order the CWP have S845A (Hot-climate version) deleted?

So we all need to include an extra detail:
- Does your car have the CWP (Cold Weather Package)?

I think this could be it.
From what I can tell in my car both auxiliary radiators are for coolant.
The passenger side takes the hotter intake while auxiliary radiator on driver side takes cooler output from the main radiator.
Cars with CWP may have hot-climate option removed so the additional cooling on the driver side is not needed and it is removed.

[Viffermike]

Originally Posted by akuan99

I think this could be it.
From what I can tell in my car both auxiliary radiators are for coolant.
The passenger side takes the hotter intake while auxiliary radiator on driver side takes cooler output from the main radiator.
Cars with CWP may have hot-climate option removed so the additional cooling on the driver side is not needed and it is removed.

That's what I'm thinking, too. And lemme tell ya, that SUCKS.

Just because I like heated seats in the winter (and even early spring/late fall) and want that trick heated steering wheel, I've got to settle on my engine having less cooling capacity in a climate where summer temps routinely go over 100 degrees?

Ummm ... guys ... I think it may be petition time, part deux (First one: the HK fiasco last year) ...

(I'm now quite glad that I bought a P3Cars gauge. At least I can monitor coolant temps.)

[Killramos]

Originally Posted by Viffermike

This is interesting. On my car, which has the Cold Weather Package, each corner has a plastic tunnel that leads from the wheel well to the front bumper area; there's an access panel to each in the corresponding wheel well right next to where the wheel well grate is/should be. My thought is that it's a routing tunnel to carry washer/parking sensor tubing and wiring. Two thoughts:

1). I wonder if cars without the CWP (Cold Weather Package) have these tunnels?

And the big one:
2). I also wonder if those who order the CWP have S845A (Hot-climate version) deleted?

So we all need to include an extra detail:
- Does your car have the CWP (Cold Weather Package)?

I dont think CWP is a thing for Canadian cars

estoril-blau metallic B45
Leather "Dakota"/schwarz LCSW
Selection of COP-relevant vehicles 01CA
Steering wheel heater 0248
Sport automatic gearbox 02TB
Alarm system 0302
Integrated universal remote control 0319
Comfort access 0322
Reversing camera 03AG
Glass roof, electrical 0403
Floor mats velours 0423
Interior/outside mirror with auto dip 0430
Interior mirror with automatic-dip 0431
Smoker package 0441
Seat adjustment, electric, with memory 0459
Through-loading system 0465
Seat heating driver/passenger 0494
Accent strips, black, high-polish 04DL
Blow-by heater 04NE
Park Distance Control (PDC) 0508
Rain sensor 0521
Xenon Light 0522
Adaptive Headlights 0524
Automatic air conditioning 0534
Kilometre speedo 0548
Light package 0563
High-beam assistant 05AC
Decoding anti-glare high-beam assistant 05AP
Driving Assistant 05AS
Navigation system Professional 0609
Satellite tuner 0655
Hi-Fi system Harman Kardon 0674
Area-Code 1 for DVD 0697
Intelligent emergency call 06AC
TELESERVICES 06AE
Connected Drive Services 06AK
Real-Time Traffic Information 06AM
Concierge Services 06AN
Remote Services 06AP
Internet 06AR
Apps 06NR
Comfort telephony w/ enhanced Smartphone 06NS
sorrent-blau metallic, Zierl si/si 0838
High speed synchronisation 0840
Oil service interval 15,000 km/12 months 08KL
Decoding, variable light distribution 08S4
Dummy- SALAPA0925
Outer skin protection 09AA

From MyBMW all of my packages.

[Viffermike]

Originally Posted by Killramos

I dont think CWP is a thing for Canadian cars :

HAR! Indeed ...

OK: Killramos' M235i has all the CWP trappings and both radiators. But: it's a Canadian-spec car, so this phenomenon may only be for U.S. F22 models.

Anyone in the U.S. with the CWP and both radiators?

[Thescout13]

Originally Posted by akuan99

I think this could be it.
From what I can tell in my car both auxiliary radiators are for coolant.
The passenger side takes the hotter intake while auxiliary radiator on driver side takes cooler output from the main radiator.
Cars with CWP may have hot-climate option removed so the additional cooling on the driver side is not needed and it is removed.

I have the hot weather package on mine per my Vin and no CWP. I'm also in the US AND don't have the radiator

The mystery lives on!!!!!

[akuan99]

I think the driver side auxiliary radiator deletion started on 2015 model as I've not seen 2014 model without it.