DIY Insider: BMW X5 E53 Air Suspension Replacement – All 4 Corner Air Ride –

Have you looked at the BMW E53 X5 Air Suspension Schematics ?!  Yikes.

You should look at it before you start this Air Bag to Coil Spring Replacement project — or you will be towing your Beemer into a BMW repair shop — to complete your unfinished work !

Your Hardware Kit for an Air Suspension replacement looks like this. You Message Center is going to go nuts with Errors unless you address this issue too. Are you going leave the remaining ‘guts’ in you trunk ?

ALL 4 CORNER AIR SUSPENSION REPLACEMENT BMW E53 X5 (2002 – 2006)

A great place to start is with Suncore suspension solutions right HERE:

This was a BIG project for me; especially the electronic modules, wiring harnesses, ride level control dash module and dash lights. The hardware was mostly obvious … the error lights on the dash not so much.

The Front Suspension is a bit more involved.

My initial concern was what would happen to the Ride Height and Vehicle “Stance” after the Air Bags were replaced with Coil Springs since it has factory installed Auto Adjust with the switch on the dash talking to an electronic module. Also, it was a complete guess what the suspension performance would be like after the install.

I used Suncore products since they had very thorough online documentation and videos on the issues that I was concerned about.

The better Performance Coilover kits for the BMW E53 X5 are perfect for street driving and occasional road course challenges.

Twist the Adjustment knobs for fine tuning the compression/rebound and separately adjustable ride height. You choose how low or high you want your vehicle stance; there is no preset Ride Height. Locking ring keeps it tightened in.

Ball mounts to provide the suspension feedback to sharpen steering response. Front and rear camber plates also allow you to get the perfect alignment setup without compromise.

The #1 starting should be an Fault Scan of the Air Ride  — if at all possible — by having a BMW Technician use a BMW Suspension Scan Tool to determine what trouble codes / failure mechanisms are happening in the system.

My initial Air Ride Failures:

1. Front right leaning down after parking.
2. Rear suspension sag when parked overnight
3.  Error messages reported in the gauge cluster

BMW Suspension Scan Tool Analysis:

I was ready to tear out the 4 corner Air Ride hardware and replace it with Coil Overs when part of the problem was the Control Module

• BMW E53 Air Suspension Control Module Fault
• Also known as a Self Leveling Suspension Control Module

Look under your Rear Trunk deck and you will see a complete Air Ride System including the Electronics and Wiring Harnesses.

If You just unplug the Air Ride, your In Dash Message Center will light up like you have never seen before … and that’s a non starter.

https://www.caranddriver.com/research/a31994163/air-suspension/

Air Ride to Coil Over Swap Out is Costly. You need to get a lot for your money …

Enjoy higher corner speeds due to air suspension being better suited to the surface of the road ! Air suspension reduces the tendency of short wheelbase trucks to bounce over rougher roads and terrain when the vehicle is empty. Driver comfort is improved due to the reduction in noise, harshness, and vibration on the road that can cause driver discomfort and fatigue. Experience less wear and tear on the suspension system due to reduced harshness and vibration of punishing driving conditions. Air suspension improves the ride height based on the load weight and a vehicle’s speed.

The cost of the Swap back to Coil Overs from Air Suspension might be a Toss Up in cost to repair the Air Suspension. Diagnose the problem first.

“Electronically controlled air suspension also features height sensors that are based on sensing resistance in contact with the terrain on all four of the vehicle’s corners to provide height reference for all corners.”

One of the big issues with messing with Air Ride is that it is Electronic On-the-Fly adjusting and has manual mode as well. If you disconnect it or interrupt its operation, your In Dash Message Center is going to light up and report Errors! You can Cheat HERE: Air Suspension Warning Message Removal Tool – For Use with Air to Coil Over Suspension Conversion Kits

https://suncoreindustries.com/product/17935/e53-air-suspension-warning-light-removal-tool-bmw-x5

But if any car can eradicate the unpleasantness of this country’s unreliable climate, it ought to be the Dawn. Especially with prices starting at a not inconsiderable £264,000.

Most certainly. There’s rather a lot of car here – the Dawn is 5.3 metres long, 1.9 metres wide, and it tips the scales at 2.5 tonnes. That makes it heavier than a seven-seat Audi SQ7.

You notice how large the Dawn is merely by how long it takes to walk from one end to the other, while the wonderfully over-engineered, rear-hinged doors demand a lot of room as they swing open to nearly 90-degree angles from the car.

Lord no, but nor is anything the Dawn does. And that’s what so utterly beguiling about it. The engine is a 6.6-litre V12, mounted surprisingly far back under that front bonnet. It’s shared with the Ghost saloon and Wraith coupe, but uses the former car’s lower output.

‘Lower’ still translates into 563bhp and 575lb ft of torque, mind, enough to propel the Dawn from 0-62mph in five seconds. The top speed is an electronically limited 155mph.

Yes and no. Push the accelerator all the way down – the pedal travel is “are you sure you want drive so uncouthly quickly?” long – and with all 575lb ft available from just 1,500rpm, you’ll be fired along exceedingly rapidly.

But so desensitised is the Dawn that it’s all bewilderingly drama-free. There’s barely a muster of engine noise, no sense that turbochargers are boosting its output, and no tangible evidence of its automatic gearbox containing eight entire speeds.

Electric Air Ride. Is it necessary?

Lord no, but nor is anything the Dawn does. And that’s what so utterly beguiling about it. The engine is a 6.6-litre V12, mounted surprisingly far back under that front bonnet. It’s shared with the Ghost saloon and Wraith coupe, but uses the former car’s lower output.

‘Lower’ still translates into 563bhp and 575lb ft of torque, mind, enough to propel the Dawn from 0-62mph in five seconds. The top speed is an electronically limited 155mph.

Does it feel fast?

But so desensitised is the Dawn that it’s all bewilderingly drama-free. There’s barely a muster of engine noise, no sense that turbochargers are boosting its output

In fact, every element of the Dawn smoothly irons out anything one might consider “feedback”. The overly large steering wheel contains barely a jot of feel, while the biggest bumps you can find will all be smothered entirely by the suspension. My first few hours guiding the ginormous feeling Dawn around are pretty tentative, then.

Yes and no. Push the accelerator all the way down – the pedal travel is “are you sure you want drive so uncouthly quickly?” long – and with all 575lb ft available from just 1,500rpm, you’ll be fired along exceedingly rapidly.But get accustomed to the Dawn’s size – its large wing mirrors mean you can point them down to show where the lane markings are, while still seeing everything behind you – and it’s a fun car to build speed and confidence in.

Can you actually have fun in it?

Surprising amounts. At first, it feels like Rolls is doing everything it can to throw keen drivers off the scent: the steering is super slow, there’s no option to manually control the gears, and there’s barely any engine braking when you lift off the throttle, so you heave on the hard-working brakes more than you’d like.

Yet once you realise there’s plenty of grip hiding beneath all those cocooning layers of comfort, you can have a go at driving this thing quickly. The trick is not taking lots of speed into a bend – there’s simply too much mass for that – but to carefully turn in and, once the car has obliged, use an indulgent amount of throttle so that the rear squats down and you ride that wave of luxurious speed out of the corner. Get the hang of it and you can carry some serious pace across country roads.

Equally, of course, you can settle down, using the smallest smidgen of its ‘Power Reserve’ gauge possible (rev counters are so unclassy) and enjoy what a masterfully refined car this is. Roof up, the silence is zen-like, and full-size adults will still be comfy in the back.

Above 50mph and things can get a little cold and blustery if the soft top is folded, however. But let’s blame Britain’s wintry weather for that rather than the car. If it all gets a bit much, the roof can be operated at up to 30mph, though given the sheer size of it, the mechanism does take a little while.

Any other demerits?

If we’re nitpicking, yes. There’s only one USB port, and it’s located very unhelpfully if you wish keep your phone charged while using a sat nav app. And the Dawn isn’t much fun to park.

Otherwise, though, it’s as supreme as you’d hope. Perhaps more so. The materials are almost beyond description: only a few rogue buttons and the media screen layout highlight any BMW parts sharing, and everything from the copious swathes of wood to the thickly piled carpets (I’ve never had anything as plush in my house) will make you feel so, so good. As does driving with the Spirit of Ecstasy in the middle of your view forwards.

Rolls-Royce unashamedly goes its own way, even if that does make its cars ergonomically odd. The heating controls demand a degree of guesswork and the doors take some getting used to. But there’s so much class and character here. It’s an inspirational and irresistable car. The ultimate compliment? This one is specced to £331,500, and I don’t think I’d feel short-changed if I’d actually paid that.

That tells us it’s an Audi Q5, BMW X3, Mercedes GLC and Porsche Macan rival. It looks nicely sharp and chiseled, in a way the car it replaces – did you know you can currently buy an Infiniti QX50? – isn’t. The new one looks decent, no?

It will ‘delegate’ more onerous driving tasks to the car.

It’s a concept for now, and that means little technical detail but much styling chatter. The design language is called ‘Powerful Elegance’, while the interior, when we see it, will be “driver-centric, passenger-minded”. So expect some nods to sportiness in the dials, and the key dashboard controls to be angled towards the driver’s seat, a la BMW.

Perhaps unexpectedly for a car that’s “driver-centric”, though, there is plentiful talk of autonomous-ness. “Infiniti’s autonomous drive technologies will act as a ‘co-pilot’ for the driver, empowering rather than replacing them,” says the Japanese company.