Used BMW 5 Series G30 520d: A Buyer’s Guide
The BMW 5 Series G30 was built from 2017 through 2023. The diesel 520d is the most common version on the used market: a 2.0L four-cylinder diesel with 295 lb-ft of torque, rear-wheel drive or xDrive all-wheel drive, and a 6-speed manual or an 8-speed Steptronic automatic. 0–60 mph takes about 7.3 s, and top speed is 146 mph.
The short verdict on the model: the B47 engine is generally reliable, but it holds up only with strict maintenance. The risk points are the timing chain past 93,000 miles, EGR valve clogging, the AdBlue system, and the diesel particulate filter (DPF).
Specifications
| Spec | Value |
|---|---|
| Model | BMW 5 Series (G30) |
| Model Years | 2017–2023 |
| Variant | 520d |
| Engine | diesel, 4 cylinders, 2.0L, B47 code |
| Power | 190 hp (184 hp on some versions) |
| Torque | 295 lb-ft |
| Drivetrain | rear-wheel drive or xDrive AWD |
| Transmission | 6-speed manual or 8-speed Steptronic automatic |
| 0–60 mph | ≈ 7.3 s |
| Top Speed | 146 mph |
| Claimed Fuel Economy | 47–52 mpg |
| Real-World Fuel Economy | 36–43 mpg |
| Trunk Capacity | 530 L |
The power figures in the source data don’t settle on one number: the spec block lists 190 hp, with “or 184 hp depending on the version” alongside. The 6-hp spread between B47 revisions isn’t arbitrated, so both figures are given as is.
Design and Character
The 520d’s engine is a 2.0L four-cylinder diesel from the B47 family. With 295 lb-ft on tap it pulls hard at mid-revs: in traffic the car rolls along evenly, without constant gear changes. That flexibility is the 520d’s main virtue. Some drivers find the power reserve lacking, but for mixed driving it’s enough.
The transmission is either a 6-speed manual or an 8-speed Steptronic automatic. Owners point to the automatic’s smoothness and responsiveness. Drive is rear-wheel or xDrive all-wheel, which widens the choice for winter use.
What Service Shops Actually See
520d repair orders cluster around three themes: noise on cold start (a reason to check the timing chain), lost pull and rising fuel consumption (EGR), and AdBlue and DPF warnings. Electrical glitches are rarer and usually don’t come back.
Common Problems and Causes
Timing Chain
Past 93,000 miles, some owners report chain problems. Over time the chain stretches and cam timing drifts away from spec. Before buying, check the service history and inspect the chain’s condition. A cold-engine test helps you hear any unusual noise.
On the 520d a chain failure is rare but expensive to fix: the source data offers no official failure-rate statistics, so the risk assessment stays qualitative.
EGR and Injectors
The EGR valve feeds a portion of exhaust gas back into the intake. In city driving, incomplete-combustion residue settles on the valve; cleaning is needed less often if the car regularly runs on the highway. Clogging leads to power loss and higher fuel consumption. In neglected cases, cleaning or replacing the valve is the fix. The injectors need attention around the same time.
Suspension
Front suspension bushings can wear prematurely — the telltale symptom is clunks. Adaptive shock absorbers (if fitted) are a reliable unit, but an expensive one to replace.
AdBlue System and DPF
The DPF traps soot, and burning it off (regeneration) requires high exhaust gas temperatures. Short city trips never let the filter heat up, regeneration never kicks in, and the filter gradually clogs up.