Question about Z4 facelifts

Mik

Member
 Colchester Essex
Can anyone give me a list of what the diffrences were pre and post facelift? All I know is the all clear look headlights and front nose cone moulding
 
Some obvious stuff for starters:

Engine is different
Rear bumper cover shape
Rear lights design and wiring
heater control bezels
main colours
Wheel designs
paddle shifts on the auto
 
A new range of engines came out: 2.0 four cylinder, 2.5i 177bhp, 2.5si 218bhp, 3.0si 265bhp.

Uprated interior with more colour combinations available.
 
6 speed auto instead of 5
Change to hood locking mechanism
6 speed on 2.5 instead of 5
Changes to electronics - brake drying, hill start assistant, etc
Sport trim level introduced
 
cj10jeeper said:
Some obvious stuff for starters:

Engine is different
Rear bumper cover shape
Rear lights design and wiring
heater control bezels
main colours
Wheel designs
paddle shifts on the auto
So what is the brake force display all about that BMW speak of in the brochuure
 
Mik said:
cj10jeeper said:
Some obvious stuff for starters:

Engine is different
Rear bumper cover shape
Rear lights design and wiring
heater control bezels
main colours
Wheel designs
paddle shifts on the auto
So what is the brake force display all about that BMW speak of in the brochuure

normal breaking just the brake lights come on. Use extra force and the tail lights & fogs (if they are not on) are also illumindated, only ever seen it work on my bosses 535 on the way to work when we were having some fun cant see it on the Z4 when driving :(

Dont remember seeing it on the cruise I went on last week either.

a: because nobody ever needed it
b: you just dont notice it, which nobody else would (non BMW driver wont know what it means)
 
I think thats the DBC, Dynamic Brake Control system - Automatically boosts brake force to its maximum when the brake is pressed down rapidly, thus helping to shorten brake distances.
 
srhutch said:
Mik said:
cj10jeeper said:
Some obvious stuff for starters:

Engine is different
Rear bumper cover shape
Rear lights design and wiring
heater control bezels
main colours
Wheel designs
paddle shifts on the auto
So what is the brake force display all about that BMW speak of in the brochuure

normal breaking just the brake lights come on. Use extra force and the tail lights & fogs (if they are not on) are also illumindated, only ever seen it work on my bosses 535 on the way to work when we were having some fun cant see it on the Z4 when driving :(

Dont remember seeing it on the cruise I went on last week either.

a: because nobody ever needed it
b: you just dont notice it, which nobody else would (non BMW driver wont know what it means)
Well I tried pressing th brake pedal really hard in the garage to reflect on the garage door and no diffrence so are we saying that it is triggered with abs or something ?
 
Does anyone know homw brake drying works and did pre facelift have a clip on the roof header rail you had to release before you powered it open or were they totally manual
Cheers for answering all the questions but its really intresting knowing the evolution of these cars
By the way if anybodys got any of these sort of questions on the Boxster.... I m yer man !!!
 
From facelift launch -

Dynamic Stability Control +

All BMW Z4 buyers will benefit from the most advanced form of traction control currently on offer in a production car – Dynamic Stability Control+ (DSC+). DSC provides the driver with a safety system that includes Automatic Stability Control, Corner Brake Control and Dynamic Traction Control. When required to keep the car on the road and stable, these functions combine under the banner of DSC to cut engine power, brake individual wheels and switch traction between wheels for optimum grip. DSC+ builds on the already accomplished set-up of DSC by adding five further features: Brake Pre-tensioning, Brake Drying, Hill Start Assistant, Fade Compensation and Soft Stop.

• Brake Pre-tensioning shortens stopping distances by priming the brakes the instant the driver snaps off the accelerator in preparation for an emergency stop. The result is a car that has already commenced the stopping process in an emergency situation by the time the driver even applies foot to brake pedal.

• Brake Drying improves braking performance in the wet. Driving on wet roads leads to a film of water building up on the brake discs. Naturally this lengthens stopping distances when the brakes are applied as the pads cannot bite the disc as effectively as in the dry. With Brake Drying, the activation of the windscreen wipers or a signal from the screen-mounted Rain Sensor enables a periodic gentle application of the brakes to scrub off any residue. When full stopping power is required, maximum braking force is available. In day-to-day driving, this periodic brake application is unnoticeable and, to avoid any confusion or danger, the brake lights do not illuminate when Brake Drying is active.

• Hill Start Assistant allows a manual transmission car to pull away smoothly on a gradient without rolling backwards. It is achieved by maintaining brake pressure for the short time taken to apply the accelerator after releasing the foot- or handbrake. The system judges the gradient of slope and the subsequent degree of brake pressure needed to ensure a smooth start.

• Fade Compensation. When the brakes get very hot it is possible that a driver can experience some fade in stopping power. Consequently, they need to apply greater force to achieve the same braking effect. Fade Compensation recognises this situation and applies additional braking without any extra effort from the driver.

• Soft Stop. This guarantees a smoother journey for driver and passenger. It prepares the car for a perfectly smooth stop by releasing a small proportion of braking pressure as the car comes to a standstill. In the event of an emergency, Soft Stop becomes inactive in order to achieve the shortest stopping distance.
 
Mik said:
Does anyone know homw brake drying works and did pre facelift have a clip on the roof header rail you had to release before you powered it open or were they totally manual
Cheers for answering all the questions but its really intresting knowing the evolution of these cars
By the way if anybodys got any of these sort of questions on the Boxster.... I m yer man !!!


The roof in the UK has always been automatic.
 
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