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.
full bulletin at NHTSA ↗2021 BMW X5 engine problems
moderate Owners of the 2021 BMW X5 have filed 12 NHTSA complaints about the engine at roughly $3,100 to repair (U.S. federal records, as of July 2026). Source: NHTSA Office of Defects Investigation. See engine across all vehicles →
Complaints
12
Recalls
0
Avg fix
$3,100
| Model year | engine complaints |
|---|---|
| 2017 X5 | 10 |
| 2018 X5 | 13 |
| 2019 X5 | 40 |
| 2020 X5 | 28 |
| 2021 X5 (this page) | 12 |
| 2022 X5 | 4 |
| 2024 X5 | 4 |
When does it fail?
Of the 12 engine complaints filed for the 2021 BMW X5, here's the actual mileage breakdown — failures cluster heaviest at 25,000-50,000 mi.
0-25k
25-50k
50-75k
75-100k
100-125k
125-150k
150k+
Each bar shows the share of total complaints filed at that mileage range. Peak failure window highlighted. Some owners report problems earlier; some make it well past 150,000 miles symptom-free. Maintenance habits and driving conditions shift the curve as much as mileage alone.
Is there a fix? Manufacturer service bulletins
The manufacturer has issued service bulletins covering engine on this vehicle — documented repair instructions, service campaigns, or warranty extensions sent to dealers. A TSB isn't a recall (it's not a free safety remedy), but it's the manufacturer acknowledging the issue and how to fix it.
The belt pulley on the mechanical coolant pump may fracture allowing the engine drive belt to come off thecoolant pump and alternator.
full bulletin at NHTSA ↗Check Control message (CCM) indicates: (ID 213): Stop, exercising due care. Voltage supply The Service Engine Soon light is on with the following DME Fault Code: 21B209 - Starter alternator / belt for 48V system (OSA_RIEMEN_RISS): Belt betweenCombustion engine and starter generator torn And/or one or more of the following other issues are also occurring: Noise in the area of the belt drive. Odor from the engine compartment. Smoke formation in the area of the belt drive. Drive belt damaged or prematurely worn. Torn drive belt.
full bulletin at NHTSA ↗The Check Control message below appears even though the coolant level is not below minimum when theengine is cold. Check Control message (ID 166): Top up coolant.
full bulletin at NHTSA ↗Engine will crank but not start. There is no communication with the integrated fuel module (TFE) whendiagnosing with ISTA. The following two fault codes will be stored in the DME: 032B43 - Low fuel pressure system, electric fuel pump: pressure value too low CDA594 - Message (- 0x33E) missing, receiver DME, transmitter TFE
full bulletin at NHTSA ↗Source: NHTSA manufacturer communications. Bring the bulletin number to your dealer or shop.
The failure pattern owners describe
The 2021 BMW X5 engine complaints center on two distinct systems: oil pump failure and water pump/starter issues across the 40,000–80,000-mile range.
Oil pump: One detailed account describes the B58 engine's variable-displacement oil pump assembly introduced in 2018. The redesigned unit combines the vacuum and oil pumps with a thermoplastic internal carrier (PA66-GF) that regulates displacement. This carrier degrades in chemically aggressive, thermally cyclic conditions—exposure to oil additives, fuel dilution, and temperature swings. Cold-start conditions in sub-freezing climates reportedly impose peak stress on the thermoplastic, leading to fracture. Debris then enters the pump, destabilizing oil pressure. Precursor symptoms include inability to read electronic oil level via iDrive, erratic oil pressure behavior, intermittent lubrication warnings, and rapid progression to bearing damage and seizure. Drivers may receive insufficient warning before catastrophic failure, including during highway operation.
Water pump: Five complaints report coolant leaks and water pump failure, starting at 40,000 miles. One owner's vehicle shut down completely on the highway and began smoking violently. Owners note 720,000 BMW X5s were recalled for the same issue; some vehicles appear excluded from the recall despite identical failures.
Starter: Three complaints describe starter failure around 44,000–55,000 miles, with DTC 0012240600 cited in one case. One repair cost $2,166.35; another owner states their failure is not part of the current BMW X5 starter recall (25V644000).
Same BMW X5 engine reports on nearby years: 2018 · 2019 · 2020
Failure modes owners describe
B58 Oil Pump Thermoplastic Carrier Fracture
Thermoplastic internal adjusting ring (PA66-GF) in variable-displacement oil pump assembly fractures under cold-start mechanical stress and thermal cycling, allowing debris ingestion and unstable oil pressure regulation.
When: Cold-start conditions, particularly sub-freezing climates; no specific mileage reported
Symptoms owners cite: Inability to perform electronic oil level measurement via iDrive; Erratic or oscillating oil pressure behavior; Intermittent lubrication warnings or absence of warning prior to failure; Rapid progression to bearing damage and engine seizure
Repairs/costs cited: Engine bearing damage and potential seizure; no specific repair costs cited in narratives
Water Pump Failure and Coolant Leakage
Water pump develops internal or external leakage, causing coolant loss and potential engine overheating or shutdown.
When: 40,000–80,000 miles
Symptoms owners cite: Coolant warning light illumination ('Coolant Dangerously Low - Fill Right Away'); Visible coolant leak from bottom of vehicle; Check engine light illumination; Complete engine shutdown with smoke production on highway
Repairs/costs cited: Water pump replacement required; one instance of catastrophic failure with smoking and complete shutdown during highway operation
Recalls/TSBs owners mention: NHTSA Campaign Number 24V608000 (Engine and Engine Cooling, Electrical System); owners report 720,000 units recalled but some vehicles with identical failures appear excluded from recall
Starter Motor Failure
Starter motor fails to operate reliably, producing abnormal sounds and preventing reliable engine start.
When: 44,000–55,000 miles
Symptoms owners cite: Abnormal sputtering sound during starting; Multiple start attempts required; Warning lights illumination; Failure to start vehicle
Codes mentioned: 0012240600
Repairs/costs cited: Starter replacement; one documented repair cost $2,166.35
Recalls/TSBs owners mention: NHTSA Campaign Number 24V576000 (Electrical System, Engine and Engine Cooling); one owner reports failure is not part of current BMW X5 starter recall (25V644000)
Synthesized from 12 NHTSA owner complaints — unverified consumer allegations, summarized for patterns. The verbatim filings appear below.
What owners are reporting 3 most recent
BMW 2021 X5 Engine starter failed. BMW South Miami dealership troubleshooting found the starter motor faulty and replaced it. This failure is NOT part of the current starter recall for BMW X5. (25V644000) My X5 maufactured date is June of 2021. I purchased the X5 In July of 2021. I paid $2166.35 for repairs and I am seaking a refund.
The contact owns a 2021 BMW X5. The contact stated that upon starting the vehicle, there was an abnormal sputtering sound coming from the vehicle. After several attempts, the vehicle was able to start. The vehicle was taken to the dealer, where it was diagnosed with starter failure. The contact was provided with the following DTC: 0012240600. The vehicle was not repaired due to the cost. The…
The contact owns a 2021 BMW X5. The contact stated that while driving at an undisclosed speed, the coolant warning light illuminated with the message "Coolant Dangerously Low - Fill Right Away" displayed on the instrument panel. The message was displayed on several occasions. The vehicle was taken to a dealer where the dealer discovered coolant leaking from the bottom of the vehicle and diagnosed…
Had engine trouble with your 2021 BMW X5?
File a complaint with NHTSA → It's free, official, and how every report above got here — owner filings are the federal safety record this page is built on.
Common questions
How serious is the engine problem on the 2021 BMW X5?
It's a documented issue but not catastrophic. 12 complaints have been filed. Repairs average $3,100 and most owners catch it before it causes a breakdown.
At what mileage does the engine typically fail?
Based on the 12 complaints filed, engine issues most often appear around 58,300 miles. Some report problems earlier; some make it well past 150,000 with no symptoms. Maintenance habits matter — vehicles that received timely fluid services and were not regularly overworked tend to last longer.
What does it cost to fix?
Independent shops typically charge around $3,100 for engine repairs on this vehicle. Dealer pricing tends to run 20-40% higher. The exact figure depends on the specific failure mode, parts availability, and your local labor rates. If you're outside factory warranty, an extended service contract often covers this category.
Are there any recalls related to engine?
No active recalls currently cover engine issues on this vehicle. The complaints filed represent owner-reported failures that haven't risen to the level of a manufacturer-issued recall — but they're still worth knowing about before you buy or budget for repairs.
Related
Complaint and recall data sourced from the National Highway Traffic Safety Administration (NHTSA)
public records database. Verify the raw federal record at
nhtsa.gov/vehicle/2021/BMW/X5.
Severity ratings are derived from reported crashes, fires, injuries, and fatalities. Repair cost estimates are
independent-shop national averages and may differ in your area. Some links on this page are affiliate links.