Reviving a Neglected BMW E39: How a Cheap Set of Coilovers Brought a Forgotten Project Car Back to Life

There’s a car sitting in the yard. It’s called Slyva — Lithuanian for plum. It’s a BMW E39, and it hasn’t moved properly in years. The front has no springs. The rear air suspension has leaked out. The body is rough, the paint is tired, and the whole thing looks like it’s been abandoned.

But underneath all that neglect, there’s something worth saving. And with a minimal investment, it’s finally driving again.

The Problem With Air Suspension

The E39 — particularly the Touring wagon — came with rear air suspension from the factory. It was a clever system when new. Self-levelling, comfortable, capable of handling heavy loads without sagging. But like all complex systems, it ages. The air springs perish. The compressor wears out. The lines develop leaks.

When that happens, you have two choices: spend a fortune replacing components that will fail again, or rip it all out and fit conventional springs.

This car had already lost its front springs entirely. Someone had removed them, leaving the shocks to do all the work. The result was a car that bounced and crashed over every bump like a shopping trolley on a cobbled street. The rear wasn’t much better. The air suspension had failed, and the car sat low and listless, with no support at all.

The Plan: Cheap Coilovers and a Return to Basics

The goal wasn’t to build a show car. The goal was to make the car usable again. To get it back to a state where it could be driven without wincing at every pothole. To make it a car again, rather than a static object in the yard.

The solution was simple: coilovers. A set of used, inexpensive coilovers from another BMW — in this case, E61 5 Series units. They’re shorter than standard E39 shocks, which means they work better with a lowered ride height. And crucially, they bolt straight in.

The rear would be converted from air suspension to conventional springs. The compressor, the air lines, the height sensors — all of it would come out. In its place, a simple spring and shock setup that would never leak, never fail, and never cost a fortune to repair.

The Work Begins

The first job was to get the car into the garage. That sounds simple, but when a car has been sitting for years, nothing is simple. The battery was dead. The windows were frozen. The hood release was stuck. Every small task became a battle.

With a fresh battery borrowed from another project, the engine turned over. The diesel clattered to life, rough at first, then settling into its familiar rhythm. It hadn’t run in a long time. It smoked. It smelled. But it ran.

Getting it into the garage took patience. The steering was heavy, the brakes were questionable, and the suspension — such as it was — offered no support. But eventually, it was inside. Time to work.

Front Coilovers: Straightforward, for Once

The front suspension was the easy part. The old shocks came out without too much drama. They were tired, covered in grime, clearly original or close to it. The new coilovers went in with minimal fuss. The mounting points matched. The bolts lined up. For once, a job went according to plan.

The adjusters on the coilovers were seized, which meant the ride height couldn’t be fine-tuned. But they were set roughly evenly, and for a winter beater, that was good enough. The goal wasn’t perfection. The goal was function.

One important note: when removing the front shocks on an E39, don’t remove the top mount unnecessarily. The bearing and mount can stay in place, and the shock will slide out with a bit of persuasion. It saves time and avoids damaging components that are getting hard to find.

Rear Suspension: Removing the Air, Installing Springs

The rear was more involved. The air springs had to come out, along with the compressor and the height sensors. The air lines had to be disconnected and removed. It’s not technically difficult, but it’s fiddly. There are clips and connectors that break if you’re not careful. There are bolts that haven’t moved in years.

The springs that went in were conventional units, matched to the new shocks. The result is a rear end that sits properly, supports weight, and won’t leave you stranded when an air line inevitably fails.

One thing to watch for: the fuel filler neck and the lines running to the tank are dangerously close to the rear suspension components on a lowered car. With the original air suspension, the car could be raised when needed. With springs, it sits at a fixed height. If that height is too low, you risk damaging fuel lines on speed bumps or steep driveways. Something to keep in mind.

The First Drive

With the suspension in and the wheels back on, the moment of truth arrived. The car came off the jack stands. The handbrake was released. And for the first time in years, the E39 moved under its own power, on proper suspension.

The difference was immediate. The bouncing, crashing ride was gone. The car felt planted. It felt like a car again, rather than a collection of parts loosely held together by gravity and hope.

It wasn’t perfect. The ride height was still a touch high at the front, and the rear could come down a bit. The alignment was approximate at best. But it drove. It steered. It stopped. And it didn’t make any alarming noises.

For a car that had been written off as a lost cause, that’s a victory.

What It Cost

This is the part that matters. The total investment was minimal. A used set of coilovers. A pair of rear springs. A few hours of labour. That’s it.

Compare that to the cost of replacing the factory air suspension with new components. Compressors alone can run into hundreds. Air springs aren’t cheap. And the system will fail again, because that’s what complex systems do.

By converting to conventional springs, the car becomes simpler, cheaper to maintain, and more reliable. It’s a trade-off — you lose the self-levelling capability — but for a car like this, it’s the right call.

The Bigger Picture

There’s a certain philosophy at work here. Old cars don’t need to be perfect. They don’t need to be original. They don’t need to be show winners. They just need to work.

A car that sits in a yard, unused and unloved, is a waste. A car that drives, even if it’s rough around the edges, is a joy. The goal isn’t to restore. The goal is to revive.

This E39 will never be a collector’s item. The paint is rough. The interior is worn. There are rust spots and scratches and a hundred small imperfections. But it drives. It does what a car is supposed to do.

And that’s enough.

The Verdict

If you have an old car sitting around because the suspension is shot, because the air system has failed, because it’s too expensive to fix properly — consider the cheap route. Coilovers and conventional springs. It won’t be factory-spec. It won’t be perfect. But it’ll get the car back on the road.

And a car on the road is worth ten cars in a garage.

The plum is back. It’s rough. It’s loud. It’s imperfect. But it drives. And that’s all that matters.