BMW Garage BMW Meets Register Search Today's Posts Mark Forums Read
BMW Z4 Forums (G29) BMW Z4 (G29) General Forum Wash the Z4

Post Reply
 
Thread Tools Search this Thread
      09-26-2019, 02:19 AM   #1
juju86
New Member
0
Rep
16
Posts

Drives: Z4 M40i
Join Date: Jul 2019
Location: Switzerland

iTrader: (0)

Wash the Z4

Hi,

I have a simple question : it is the first convertible I own, and the dealer told me I can wash it like any other car. So do you wash your Z4 to standard automatic wash with rotating brushes?

Thanks
Appreciate 0
      09-26-2019, 08:21 AM   #2
Tokkugawa
Registered
0
Rep
2
Posts

Drives: Bmw m235i
Join Date: Jul 2019
Location: Sweden

iTrader: (0)

I would never wash it an auto wash anyway since it will microscratch your paintwork. Id rather try a "brushfree" wash in that case. That being said it should not be an issue to wash it.
Appreciate 0
      09-26-2019, 08:43 AM   #3
Jim S
Member
Jim S's Avatar
Scotland
216
Rep
188
Posts

Drives: Z4 M40i G29
Join Date: May 2017
Location: Scotland

iTrader: (0)

Garage List
I would recommend coating your fabric roof with a good waterproofing agent such as Gtechniq Smart Fabric v2. You then just hose it down occasionally when you wash the car to remove any dust etc.

Donít put your car through a car wash, just hand wash it.

Last edited by Jim S; 09-27-2019 at 03:43 PM..
Appreciate 0
      09-26-2019, 09:36 AM   #4
German1967
Lieutenant
German1967's Avatar
United_States
212
Rep
521
Posts

Drives: 2015 M235xi - 2020 Z4 M40i
Join Date: Mar 2015
Location: Ohio

iTrader: (0)

I use the same car wash as with any other car. Cloth no bristles. No wax.
No issues.
__________________
Hoc Lapidem Non Vi Sed Saepe Cadendo!
Appreciate 0
      09-26-2019, 11:59 AM   #5
juju86
New Member
0
Rep
16
Posts

Drives: Z4 M40i
Join Date: Jul 2019
Location: Switzerland

iTrader: (0)

Thanks for your replies.
Appreciate 0
      09-26-2019, 12:03 PM   #6
ToysArs
Enlisted Member
23
Rep
44
Posts

Drives: 2020 Z4 M40i
Join Date: Sep 2019
Location: Lake Forest, CA

iTrader: (0)

I'm getting my sapphire black ceramic coated this weekend with Gtechniq crystal serum light and Exo v4.
Appreciate 0
      09-27-2019, 10:29 AM   #7
joshuastein55
Major
joshuastein55's Avatar
United_States
1567
Rep
1,284
Posts

Drives: Mercedes-Benz/BMW
Join Date: Dec 2017
Location: Baltimore, MD

iTrader: (0)

If you have an M40i, I'm pretty sure there are special cleaning instructions for the cerium gray trim, as the coding is different and can be harmed. Believe its in the owner's manual.
__________________
Current Vehicles: 2019 Mercedes-Benz CLS 53 AMG/2020 BMW M2 Competition 6MT
Retired Vehicles: 1995 325Ci 5MT/2004 330i 6MT/2011 335xi/2017 540i/2018 Boxster S
Appreciate 0
      10-04-2019, 03:45 PM   #8
SD ///M4
///Multiple
SD ///M4's Avatar
United_States
1934
Rep
3,379
Posts

Drives: M4 Coupe | M3 | Z4M Roadster
Join Date: Jan 2011
Location: San Diego, CA

iTrader: (1)

Garage List
Quote:
Originally Posted by joshuastein55 View Post
If you have an M40i, I'm pretty sure there are special cleaning instructions for the cerium gray trim, as the coating is different and can be harmed. Believe its in the owner's manual.
Fixed it for you...
__________________
His: 2016 M4 Coupe | Sakhir Orange | Black Full Merino Leather | CF Trim | M-DCT | More | ED 5/13/16
Hers: 2018 M3 Sedan | San Marino Blue | Black Full Merino Leather | CF Trim | M-DCT | ZCP | ED 7/18/18
Ours: 2006 Z4 Roadster | Interlagos Blue | Black Extended Nappa Leather | Carbon Leather Trim | Purchased 7/19/12

Appreciate 2
SakhirM49495.00

      10-04-2019, 09:31 PM   #9
SD ///M4
///Multiple
SD ///M4's Avatar
United_States
1934
Rep
3,379
Posts

Drives: M4 Coupe | M3 | Z4M Roadster
Join Date: Jan 2011
Location: San Diego, CA

iTrader: (1)

Garage List
I've owned a soft-top roadster since 1999, the first one a 2000 Honda S2000, and then in 2012, a 2006 Z4 M Roadster. I had the S2000 for 13 years. After I had it for several years, I got lazy and started taking it through a "touchless" car wash. The top lasted 10 years and I had it replaced in 2009. I sold the S2000 in 2012 when I bought the Z4 M Roadster used, with low mileage, from a guy in the Bay Area who mostly rode his motorcycle.

It's never been through a car wash since I've owned it. I use RaggTopp convertible top products. After 13 years the top is not showing any signs of needing replacement.

I would strongly advise against taking your Z4 through any commercial car wash, regardless of what type of car wash it is. You are far better off hand washing it and keeping soap off the top. While your car is under warranty it would be best to follow whatever recommendations that BMW has in your manual. If your car is not leased and you plan on keeping it after the warranty expires, RaggTopp products are an excellent way of keeping your top looking like new when applied on a regular basis. If you're leasing, then it really doesn't matter, as someone else will inherit your top and swirl marks. At least that sees to be the attitude a lot of leasers have.
__________________
His: 2016 M4 Coupe | Sakhir Orange | Black Full Merino Leather | CF Trim | M-DCT | More | ED 5/13/16
Hers: 2018 M3 Sedan | San Marino Blue | Black Full Merino Leather | CF Trim | M-DCT | ZCP | ED 7/18/18
Ours: 2006 Z4 Roadster | Interlagos Blue | Black Extended Nappa Leather | Carbon Leather Trim | Purchased 7/19/12

Appreciate 0
      10-05-2019, 12:45 PM   #10
juju86
New Member
0
Rep
16
Posts

Drives: Z4 M40i
Join Date: Jul 2019
Location: Switzerland

iTrader: (0)

Hi, my dealer told me to wash it like any other car, and in Z4 owner manual, there is nothing specific if I remember well.
Appreciate 0
      10-06-2019, 02:48 AM   #11
German1967
Lieutenant
German1967's Avatar
United_States
212
Rep
521
Posts

Drives: 2015 M235xi - 2020 Z4 M40i
Join Date: Mar 2015
Location: Ohio

iTrader: (0)

Quote:
Originally Posted by juju86 View Post
Hi, my dealer told me to wash it like any other car, and in Z4 owner manual, there is nothing specific if I remember well.
This is an emotional topic for some... you will get all kinds of answers.
__________________
Hoc Lapidem Non Vi Sed Saepe Cadendo!
Appreciate 0
      10-09-2019, 10:14 AM   #12
Ross Z4M40i
New Member
Ross Z4M40i's Avatar
Netherlands
11
Rep
6
Posts

Drives: BMW Z40 M40i
Join Date: Sep 2019
Location: Maastricht

iTrader: (0)

Quote:
Originally Posted by juju86 View Post
Hi, my dealer told me to wash it like any other car, and in Z4 owner manual, there is nothing specific if I remember well.
That's exactly what my dealer told me. Hand wash is not an option for me🤔
Just beware of the wax: strictly forbidden!
Appreciate 0
      10-22-2019, 02:49 PM   #13
Huz-Z
Brigadier General
Huz-Z's Avatar
Canada
513
Rep
3,584
Posts

Drives: Z4 3.0si, 328 XDrive, X5 35i
Join Date: Aug 2009
Location: Canada

iTrader: (0)

What's the line from Star Wars Episode III when Palpatine tells Vader that Padme is dead? oh yeah - "NOOOOOOOOOOOOOOO!!!!!!"

Ignore the dealer - instead, call your national BMW head office and ask them for an answer in writing, in case you should need it in the future. Without a written response from BMW, there is no proof that they advised you that commercial car washes are safe. After all, if the canvas top ever becomes damaged, BMW head office will make the call on whether it will be covered by the warranty. A new canvas top for your Z4 is an expensive part by itself, and it is complicated to install and that entire process takes many hours, so the associated labor is also very expensive. Unless you have a few thousand euros / dollars / pounds sterling to burn, you do not want to be told that the top was damaged by the car wash apparatus, and BMW won't cover it.

I've owned an E85 Z4, with a canvas top much like yours, for over ten years and I would never subject it to a commercial car wash under any circumstances whatsoever. Its one of the reasons my car still gets mistaken for brand new, even today.

And the fun part:

__________________
Huz-Z


BMW Z4 3.0si Roadster. Montego Blue Metallic. Premium and Sport Package.

Last edited by Huz-Z; 10-22-2019 at 03:14 PM..
Appreciate 0
      10-22-2019, 07:38 PM   #14
Crh97
New Member
6
Rep
12
Posts

Drives: 128i
Join Date: May 2013
Location: Paducah, ky

iTrader: (0)

No way would I ever put mine through a car wash. And the only time the top sees soap is when it's time to re-treat the top. I just rinse it off with water.
Appreciate 0
      10-23-2019, 12:00 PM   #15
DPelletier
Second Lieutenant
Canada
209
Rep
202
Posts

Drives: 2020 Z4 M40i
Join Date: May 2019
Location: Kelowna, B.C. Canada

iTrader: (0)

Yep, another "hand wash only" guy here.....esp. on a 'vert

Dave
Appreciate 0
      10-24-2019, 04:44 PM   #16
DrSecretan
New Member
United Kingdom
0
Rep
6
Posts

Drives: BMW Z4 sDrive20i
Join Date: Oct 2019
Location: Glasgow, UK

iTrader: (0)

It's worth noting that the manual states that you should use "special convertible top cleaning agent" on the roof, and that after every three to five washes you should treat that top with "impregnating agent". Looks like it's available from BMW's online shop.

Not sure if I'm going to use the official BMW stuff on the roof or spring for something a bit more high-tech like Gtechniq's I1 Smart Fabric. Anyone got any thoughts?
Appreciate 0
      10-25-2019, 07:54 AM   #17
Crh97
New Member
6
Rep
12
Posts

Drives: 128i
Join Date: May 2013
Location: Paducah, ky

iTrader: (0)

I've used Raggtopp sealant on 4 verts over a few years and the last 128i I just sold looked new at 6 years. I garage my car. I never use soap on the top unless it's time to treat and I don't treat till I "think" it needs it. Probably once a year. It works for me.
Appreciate 0
      10-25-2019, 09:42 AM   #18
DrSecretan
New Member
United Kingdom
0
Rep
6
Posts

Drives: BMW Z4 sDrive20i
Join Date: Oct 2019
Location: Glasgow, UK

iTrader: (0)

Quote:
Originally Posted by Crh97 View Post
I've used Raggtopp sealant on 4 verts over a few years and the last 128i I just sold looked new at 6 years. I garage my car. I never use soap on the top unless it's time to treat and I don't treat till I "think" it needs it. Probably once a year. It works for me.
Thanks for the tip! I'll have a look at Raggtopp.
Appreciate 0
      10-25-2019, 02:48 PM   #19
Jim S
Member
Jim S's Avatar
Scotland
216
Rep
188
Posts

Drives: Z4 M40i G29
Join Date: May 2017
Location: Scotland

iTrader: (0)

Garage List
Quote:
Originally Posted by DrSecretan View Post
It's worth noting that the manual states that you should use "special convertible top cleaning agent" on the roof, and that after every three to five washes you should treat that top with "impregnating agent". Looks like it's available from BMW's online shop.

Not sure if I'm going to use the official BMW stuff on the roof or spring for something a bit more high-tech like Gtechniq's I1 Smart Fabric. Anyone got any thoughts?
I treated my new M40i with Gtechniq I1 Smart Fabric v2 in April and only have to rinse the roof with clean water each time I wash the car. The water literally flies off the top. A light rub with a drying towel or chamois is all that is needed to dry off the remaining water.
Highly recommended.
Appreciate 0
      10-26-2019, 09:45 AM   #20
DrSecretan
New Member
United Kingdom
0
Rep
6
Posts

Drives: BMW Z4 sDrive20i
Join Date: Oct 2019
Location: Glasgow, UK

iTrader: (0)

Quote:
Originally Posted by Jim S View Post
I treated my new M40i with Gtechniq I1 Smart Fabric v2 in April and only have to rinse the roof with clean water each time I wash the car. The water literally flies off the top. A light rub with a drying towel or chamois is all that is needed to dry off the remaining water.
Highly recommended.
I was definitely leaning towards the Gtechniq. Thanks for the recommendation! I'll order it today.
Appreciate 0
      10-30-2019, 03:45 PM   #21
Tedbay
Private
41
Rep
88
Posts

Drives: 07 Z4MCoupe sold, 00HondaS2000
Join Date: Jun 2019
Location: San Ramon, CA

iTrader: (0)

Thanks for advice on top sealant - will get some. For those using Mr. Beasleys on frozen I put it on Saturday and it was super fast and easy. I plan on doing it 3-4 times per year it was so easy.

Actually significantly faster than Zaino where I used to do 2 coats 3 times per year. it is absolutely the most incredible shine ever and I highly recommend it. But this Frozen Mr. Beasleys stuff takes like 1/10 the time so from a "waxing" standpoint the frozen I am finding takes much less time for this part of the car care regiment anyway. Sure other parts will be much more work but wanted to share this aspect.
Appreciate 1
ToysArs22.50

Post Reply

Bookmarks

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 09:38 PM.




bmw
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