MyMCoupe.com
    a site dedicated to

    Scatha, a 2007 BMW Z4 ///M Coupe

Z4 M Coupe, Z4M, Z4MC, Z4MR, BMW MC

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Interior Mods

     For this car I am not concerned with improving the audio, adding bluetooth or decorative lighting. It is a track car, and as such need only have suitable amenities for drives to and from track events and weekend trips. Most of my interior mods were chosen to enhance driving precision and comfort, some for utility.

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Mod # 61, Parabolic Mirrors

     These parabolic mirrors from Multivex are not very well finished, but the effect is fantastic. The Z4 M Coupe is known to have limited visibility, but with these mirrors I now have no blind spots.

M$RP:
Install Time:
Mass effect:
Vendor:
$90
0:30
0.5lbs
Multivex
Stock BMW mirror's field of view.    Parabolic mirror back, with 3M tape.    Parabolic mirror's field of view.
     

Mod # 60, Boost Gauge

     I relocated the boost gauge for better visibility. I ran the wires and vacuum line through the dash. I fabricated a small aluminum bracket to position the gauge. Next I will fabricate a rear cover to hide the wiring.

M$RP:
Install Time:
Mass effect:
Vendor:
$35
2:30
0.50lbs
Pep Boys
Pep Boys boost gauge, installed for testing.    Pep Boys boost gauge, installed for testing.    Pep Boys boost gauge, installed for testing.
     

Mod # 56 + 65, Scangauge + Bracket

     After using the Scangauge for quite a while and finding it very useful I decided to replace my broken OEM driver's side cupholder with a small aluminum bracket I fabricated to mount the Scangauge. This also cleaned up the OBDII cable by hiding it inside the dash and routing it through the bracket.

M$RP:
Install Time:
Mass effect:
Vendor:
$180
3:00
0.03lbs
Scangauge
Scangauge, temporarily mounted for testing.    Scangauge, temporarily mounted for testing.    Scangauge, temporarily mounted for testing.    Scangauge, temporarily mounted for testing.
     

Mod # 54, Ultimate Cupholders

     Ultimate Cupholders rule! They are cheap, durable, ideally located and fit pretty much every cup and bottle known to man.

M$RP:
Install Time:
Mass effect:
Vendor:
$40 (pair)
0:10
0.56lbs
UltimateCupholders
Ultimate cupholder, installed on driver's side.
     

Mod # 50, Added Homelink

     I added a Homelink module from the E39 5 Series, so I could open my garage doors. There are less expensive products on the market, but I preferred the OEM look. Tom at EAS helped me with the wiring.

M$RP:
Install Time:
Mass effect:
Vendor:
$150
2:00
0.2lbs
BMW, EAS
Power, Ground and IBUS lines spliced into BMW factory wires.    BMW headliner, cut for Homelink.    BMW headliner, back-cut and epoxied to fit Homelink.    Homelink, installed.
     

Mod # 49, Pedal Covers

     These MRTM pedals were originally designed at BMS. Since the first prototype the designer has purchased rights to the design, started his own company (MRTM Design Inc) and refined the pedal design. The pedal covers are machined aluminum and have no rubber inserts. Contrary to popular belief, rubber insert do NOT increase traction between the pedal and driving shoe. I've tested these pedals with dry and wet shoes and in both cases traction was improved noticeably vs. stock. Best of all, the more rigid aluminum dramatically increases pedal feel.

M$RP:
Install Time:
Mass effect:
Vendor:
$300
0:30
0.6lbs
MRTM
MRTM aluminum pedal covers, co-designed with BMS.
     

Mod # 39, Removed Emergency Trunk Handle

     This annoying piece of white glow-in-the-dark plastic has a habit of presenting a strong glare in one's rear view mirror. I can be dangerously distracting, so I removed it. You can still open the trunk from inside by pulling the metal cable.

M$RP:
Install Time:
Mass effect:
Vendor:
$0
0:10
-0.01lbs
None
The cable left after removing the BMW interior trunk replease handle.
     

Mod # 34, Removed Sun Visor Warning Labels

     I used Goof Off, not to be confused with Goo Gone or any other similar product. I strongly recommend removing the visors before applying Goof Off. Also, re-hydrate the visors with an appropriate conditioner after removing the labels. I used Lexol's Vinylex.

M$RP:
Install Time:
Mass effect:
Vendor:
$5
0:15
0lbs
Home Depot
My Z4 M Coupe's sunvisor, with BMW sticker.    My Z4 M Coupe's sunvisor, after sticker removal.
     

Mod # 29, First Aid Boxes

     I got these for miscellaneous storage, not specifically to store BMW's first aid kit. They are pretty light and add a lot of storage to the small Z4. They retail for about $30.

M$RP:
Install Time:
Mass effect:
Vendor:
$60
0:35
1.12lbs
LeatherZ
A layup of the BMW first aid storage boxes, before and after installation, under my Z4 M Coupe's seat.
     

Mod # 28, Seatbelt Guides

     I am not a fan of the stock BMW Z4 M seatbelt guides, they guide the seatbelt to rub my neck. So I got some screws, nuts and rubber doorstops from Home Depot. The resulting construct allows me to keep the seatbelt from riding up the BMW guides.

M$RP:
Install Time:
Mass effect:
Vendor:
$8
0:10
0.05lbs
Home Depot
My Z4 M Coupe's seat belt guides.
     

Mod # 22, BMW Cargo Net

     I thought that the Z4 M trunk really needs a cargo net, and after the BMS battery tray mod (see Mod #13, below) the trunk was square. I got eye bolts from Home Depot and a BMW E36 cargo net. I carefully measured the hole placement, then drilled and tapped the holes. The I secured the net hooks to the eye bolts. The small nuts keep the eye bolts from rotating. Please excuse the in-progress pictures below, I had not yet gotten new trunk panels made to finish the BMS battery tray mod.

M$RP:
Install Time:
Mass effect:
Vendor:
$75
1:00
0.61lbs
BMW
Top view of the BMW E36 cargo net installed in my Z4 M Coupe's trunk.    Side view of the BMW E36 cargo net installed.
     

Mod # 19, Aluminum Roundel Stickers

     My M Coupe has brushed aluminum trim, fitting as there is a lot of aluminum used throughout the car. Because of this I opted for Bimmian's brushed aluminum roundel stickers instead of the more common carbon fiber stickers. I like the look and the individuality of the brushed aluminum.

M$RP:
Install Time:
Mass effect:
Vendor:
$25
0:30
0.1lbs
Bimmian
My Z4 M Coupe's interior with brushed aluminum stickers on the steering wheel roundel.    My Z4 M Coupe's engine bay with brushed aluminum roundel stickers.    The rear of my Z4 M Coupe, with brushed aluminum roundel stickers.
     

Mod # 15, CG-Lock

     I find this product does a decent job of holding one's lower torso in place during hard cornering. It's not as effective as a real harness, but it's not as expensive or as cumbersome to use. Buckling up does take a little getting used to compared to the stock BMW buckles, but it's relatively easy.

M$RP:
Install Time:
Mass effect:
Vendor:
$80
0:20
0.49lbs
CG-Lock
CG-Lock, installed on the factory BMW Z4 M Coupe seatbelt.
     

Mod # 14, DVD player

     This mod was installed to work through BMW's OEM tv tuner (see Mod # 9, below). It allows me to watch DVDs on my Nav screen through an Aux input harness. I also wired up a switch so I can power up the DVD player and switch DVDs while the car is off. Typically on long trips it is convenient to switch DVDs during fuelups.

M$RP:
Install Time:
Mass effect:
Vendor:
$293
3:00
3.81lbs
see .xls
BMW antenna and Aux Input lines wired.    IR remote sender for the DVD mounted on BMW rearview mirror base.    DVD and BMW TV tuner installed, also note BMS battery tray.    Remote switch for DVD power.    Closeup of DVD, installed.    DVD remote power switch installed in new trunk panel from BMS Battery Tray mod.
     

Mod # 13, BMS Battery Tray

     This mod was done to save weight and increase space in the Z4 M Coupe trunk. It started with the Odyssey 680 battery, which is strong enough for the BMW Z4 but can lose its charge more quickly than the stock battery. Then BMS designed and machined a billet aluminum battery tray and clamp. After installing the tray and battery I examined the space and determined that the M Mobility kit foam canister would fit above the battery. So I fabricated a bracket for it. I then made mock-up replacement trunk panels out of cardboard and later, carpet. I designed the left and right sides as flaps so that I could use the interior spaces for storage of the DVD player (see mod # 14), BMW Z4 Owner's Manual and BMW Z4 tool kit. They also allow me to access the rear shocks' rebound adjustment screws. A shop in Costa Mesa fabricated my trunk panels, but they are not good enough quality to sell to customers, which is why this whole kit is not available from BMS. The battery tray is produced and for sale, if you want to keep the stock battery cover or you are building a race car.
     Note: The M$RP below reflects the cost of the BMS battery tray, Battery, custom trunk panels and material for the IMS bracket. The Install Time is an estimate of the time necessary to install the finished components.

M$RP:
Install Time:
Mass effect:
Vendor:
$880
2:30
-33.3lbs
BMS
BMS battery tray, Oddysey 680 battery, and related hardware.    BMS Battery Tray kit, fully assembled.    BMS Battery Tray, installed in my Z4 M Coupe's trunk.    Another view of the installed BMS Battery Tray.    Prototype BMS trunk panels, fully closed.    Prototype BMS trunk panels, with driver-side panel open.    A stock BMW Z4 M Coupe trunk, note large battery hump.
     

Mod # 12, Imola Red MkIV Armrest

     I love the MkIV armrest. It installs very easily, holds small objects very securely, and greatly reduces driver fatigue over long distances.

M$RP:
Install Time:
Mass effect:
Vendor:
$125
0:10
1.89lbs
LeatherZ
My Z4 M Coupe's interior, with the LeatherZ MkIV armrest installed.    The LeatherZ MkIV armrest, opened.
     

Mod # 12, Imola Red Shift Boot

     I bought this to compliment the other Imola leather in my cockpit. As with all their BMW products LeatherZ only uses BMW hides, so you know it will exactly match your existing leather.

M$RP:
Install Time:
Mass effect:
Vendor:
$125
0:15
0.02lbs
LeatherZ
My Z4 M Coupe's interior, with LeatherZ's Imola Red replacement shift boot.
     

Mod # 9, Nav TV

     This mod was a collaboration of multiple components. First was an OEM BMW tv tuner. This installs easily into the Z4 M bulkhead. The BMW antenna wires and boosters get mounted inside the rear bumper (the most time-consuming step of the mod). The BMW wire loom and video block mount in the right rear of the trunk. I also got a TV-In-Motion harness to fool the BMW computer into allowing TV viewing over 3mph.

M$RP:
Install Time:
Mass effect:
Vendor:
$1470
4:15
6.41lbs
see .xls
My Z4 M Coupe, with the rear bumper removed to install the BMW TV antennas.    The trunk panels removed from my Z4 M Coupe for the Nav TV mod.    The BMW TV tuner, installed.    My Z4 M Coupe's Nav DVD unit, removed to install TV-In-Motion harness.    Nav TV, finished and working on my Z4 M Coupe's nav screen.
     

Mod # 5B, iPod Mount

     This holds my iPod in a very accessible location and does not black any BMW controls.

M$RP:
Install Time:
Mass effect:
Vendor:
$75
0:15
0.01lbs
ProClip
My Z4 M Coupe's iPod, on the Pro Clip mount.
     

Mod # 5, Monster iPod Cable

     I use this to charge my iPod and, with a 3mm wire I picked up at Radio Shack, to plug into the stock BMW Aux Input.

M$RP:
Install Time:
Mass effect:
Vendor:
$45
0:05
0.05lbs
Monster
My Z4 M Coupe's interior, featuring the Pro Clip mount and Monster iPod cable.
     

Mod # 3, Calculator

     Not a big deal, but technically it's a mod. I keep a precise fuel log and as such have found it useful to always have a calculator in each of my vehicles. I velcro'd this one inside the BMW storage compartment cover.

M$RP:
Install Time:
Mass effect:
Vendor:
$15
0:10
0.01lbs
Office Depot
The inside of my Z4 M Coupe's storage bin cover, showing the calculator.