AI Damage2020 BMW Z4: common problems
Owners of the 2020 BMW Z4 filed 5 complaints with NHTSA, most often about electrical system and steering. The maker issued 164 service bulletins for this year. Details by component below, with sources.
Key figures
- Owner complaints
- 5
- involving a crash
- 1
- Technical service bulletins (TSB)
- 164
What fails most often
- 1 Electrical system 40% of all complaints
- 2 Steering 40% of all complaints
- 3 Engine 40% of all complaints
- 4 Service brakes 40% of all complaints
- 5 Structure 20% of all complaints
- 6 Suspension 20% of all complaints
- Electrical system: 2 complaints (40% of all); manufacturer bulletins for this component: 70.
- Steering: 2 complaints (40% of all); manufacturer bulletins for this component: 10.
- Engine: 2 complaints (40% of all), 1 of them with a crash reported by the owner; manufacturer bulletins for this component: 8.
- Service brakes: 2 complaints (40% of all), 1 of them with a crash reported by the owner; manufacturer bulletins for this component: 6.
- Structure: 1 complaints (20% of all), 1 of them with a crash reported by the owner; manufacturer bulletins for this component: 11.
Engines and transmissions
US-market versions per EPA. On the right: how many NHTSA complaints name this engine or transmission type.
- 2 L · petrol · turbo · 4 cyl
- 3 L · petrol · turbo · 6 cyl
- automatic, 8-speed
Drive: RWD
Symptoms owners describe
How many of the 5 NHTSA complaints mention each symptom (automatic count from complaint text; one complaint can mention several).
Components owners complain about
| Component | Owner complaints | involving a crash | Technical service bulletins (TSB) |
|---|---|---|---|
| Electrical system | 2 | 0 | 70 |
| Steering | 2 | 0 | 10 |
| Engine | 2 | 1 | 8 |
| Service brakes | 2 | 1 | 6 |
| Structure | 1 | 1 | 11 |
| Suspension | 1 | 0 | 3 |
| Equipment | 0 | 0 | 70 |
| Visibility | 0 | 0 | 11 |
| Backover prevention | 0 | 0 | 10 |
| Engine and cooling | 0 | 0 | 9 |
| Seats | 0 | 0 | 6 |
| Fuel system | 0 | 0 | 5 |
| Lane departure | 0 | 0 | 5 |
| Powertrain | 0 | 0 | 5 |
What owners report
Short excerpts of NHTSA complaints in the original wording. These are owner statements not verified by NHTSA; personal data removed.
Was in a drive thru on 9/6/2020 waiting our turn. Approx. 7 cars in front of us. As we are slowly moving up to order, car in idle, foot on brake. As we are moving forward, when we were up to 3 cars, still idling and foot on brake, the car had fully accelerated, brake not holding the car, inching forward due to the…
The symptoms and component failure match the exact defect description of active safety recalls NHTSA 24V-576 and 25V-636 (Starter Motor Fire Risk due to electrical short circuit/overheating). However, when checking my specific 17-digit VIN, the manufacturer has excluded my vehicle from the recall population.
This is a major fire risk given the amount of rain now that could corrode the starter and lead to a fire.
There is major squeaking/whining/grinding noise if even a tiny bit of water gets in there and last couple days after that. And when you turn the steering wheel to the left the squeaking/whining gets louder. And when does do this the suspension if you hit even a small bump will bottom out and make grinding noises.
Bmw's lane departure system actually pulls the car's steering left or right, and could cause the car to collide with another vehicle or run off the road. I experienced this while driving on the freeway in southern california. The lane departure system almost pulled my vehicle into the adjacent lane.
When owners complained
NHTSA complaints by filing year. The peak shows at what age the problems show up most.
Comparison
By complaint count this model year ranks 1,688 of 2,102 model years in the NHTSA data (among the 20% least complained about).
On average one model year of the Z4 has 2 complaints (7 years in the data). This year has 5, above average.
What to check before buying
- Electrical system. Scan all modules, test the battery and alternator, inspect connectors near the impact zone.
- Steering. Steering play, power assist, rack and tie rods after a wheel impact.
- Engine. Cold start, unusual noises, oil leaks and engine codes.
- Service brakes. Pedal feel, ABS operation, leaks, discs and hoses.
Manufacturer service bulletins
Bulletin titles as filed with NHTSA.
- The EVAP systems purge (vent) valve limited warranty for defects in materials or workmanship has been…
The EVAP systems purge (vent) valve limited warranty for defects in materials or workmanship has been extended to 15 years / 150,000 miles as determined from the original in-service date.
- Bearing Shell Return
- The convertible top does not open or close
- SITUATION BMW AG is conducting a Voluntary Emissions Recall (effective April 23, 2021) on a certain Model…
SITUATION BMW AG is conducting a Voluntary Emissions Recall (effective April 23, 2021) on a certain Model Year 2020 - 2021 BMW vehicles that were produced between August 13, 2019 and December 11, 2020. Do not deliver…
- An interference noise (groaning noise) can be heard from within the heating and air-conditioning unit in…
An interference noise (groaning noise) can be heard from within the heating and air-conditioning unit in thecenter of the instrument panel. The groaning noise always occurs when either a ventilation flap, air…
- The Central Information Display goes black intermittently due to resets of the Head Unit (HU-H3)
FaultB7F8F9 ÃÂâÃÂÃÂÃÂàÃÂâÃÂÃÂÃÂÃÂHU-H: ResetÃÂâÃÂÃÂÃÂàwill be stored in the HU-H3.
- The electrical system of BMW vehicles has been subject to an ongoing development process over the last few…
The electrical system of BMW vehicles has been subject to an ongoing development process over the last few years. This has led to increased demands being placed on the battery. This document covers important…
- At low outside temperatures (below 40 degrees F) and slow driving speeds (i.e
when parking, maneuvering)with a large steering angle, the front end can be slightly axially misaligned. This can be felt (jerking)/ heard via an acoustic acknowledgement (clunk) as seen at the 11 second mark of the…
- A vehicle arrives at your center to be diagnosed for a micro-leak in the fuel evaporative (EVAP)…
A vehicle arrives at your center to be diagnosed for a micro-leak in the fuel evaporative (EVAP) system(NVLD natural vacuum leak detection). For this condition, the following fault is stored in the DME: 190302 - fuel…
- ?The outer A-pillar trim panel (arrow) protrudes outward (circled) towards the cowl seal
- BMW AG has issued a Delivery Stop (effective February 9, 2023) on certain Model Year 2022 - 2023 BMW…
BMW AG has issued a Delivery Stop (effective February 9, 2023) on certain Model Year 2022 - 2023 BMW vehicles that were produced between June 29, 2022 and February 16, 2023.
- Headlight check control (CC) message 128 "High beam headlight failure" is displayed
The following fault codes are stored during a vehicle test: 80419A - Left high-beam headlight: Short circuit and/or 8041A5 - light outputs: Number of permitted short circuit cycles exceeded
NHTSA lists 164 bulletins for this year; the 12 newest are shown here.
Other years of this model
Questions and answers
What are the most common problems with the 2020 BMW Z4?
Owner complaints to NHTSA most often mention: electrical system, steering, engine. Total complaints: 5. The most frequent symptoms in complaint texts: smoke, burning smell, fire (40%), driver assists: adaptive cruise, lane keeping (20%), knocking, grinding or other noise (20%).
How many service bulletins (TSB) were issued for the 2020 BMW Z4?
NHTSA lists 164 manufacturer service bulletins for this year. A bulletin tells dealers how to diagnose or fix a known issue; it is not a recall.
Should I buy a 2020 BMW Z4 from a US auction?
Owner complaints describe defects, not crash damage. Before bidding, check the components listed above and review the lot photos: VinWind builds a report of visible and hidden damage by VIN.
Other 2020 models
Read also
Sources: public NHTSA data (USA): service bulletins and owner complaints; YouTube: links to videos credited to their authors. Complaints are owner statements not verified by NHTSA, and describe defects rather than crash damage. Data updated 2026-11-04.