The E89 Z4 is a solid roadster platform, but the N20 2.0T turbo four (2012+ primarily, some late 2011) has catastrophic timing chain guide failures, while the N52/N55 six-cylinders are far more durable. Transmission oil cooler failures and PCV system issues affect both engines.
Symptoms: Rattling on cold start that disappears after warm-up, Check engine light with timing correlation codes (P0016, P0017), Sudden loss of power or engine will not start if chain jumps
Fix: Plastic guides disintegrate, chain jumps timing, valves hit pistons. Requires complete engine teardown: timing chain kit, guides, tensioners, often pistons/rods/head work if catastrophic failure occurred. 18-25 labor hours for full rebuild after failure, 8-12 hours if caught early for preventive replacement.
Estimated cost: $4,500-9,000
Transmission Oil Cooler Line Failure
Common · medium severity
Typical onset: 60,000-100,000 mi
Symptoms: Transmission fluid leaking near radiator area, Mixing of coolant and ATF (milky fluid in either system), Harsh shifting or slipping if contamination occurs
Fix: Plastic cooler lines crack or the cooler itself fails internally, mixing coolant and ATF. Requires cooler replacement, lines, complete fluid flush of both systems. If mixing occurred, transmission may need teardown/rebuild. Cooler-only repair: 3-4 hours. With transmission damage: add 12-18 hours.
Estimated cost: $800-1,200 (cooler only), $3,500-5,500 (with trans rebuild)
PCV Valve and Crankcase Ventilation System Failure
Common · medium severity
Typical onset: 70,000-110,000 mi
Symptoms: Rough idle and misfires, Oil consumption increases noticeably, Oil leaks from valve cover or rear main seal area, Check engine light with lean/rich codes
Fix: Valve cover integrated PCV system clogs or diaphragm tears, causing crankcase pressure buildup that blows out seals. Requires valve cover replacement (PCV is integrated, not serviceable separately). Also replace CCV hoses. 4-5 hours labor, often discovers oil leaks that need addressing simultaneously.
Estimated cost: $1,200-1,800
Fuel Injector Failure (N20 2.0T)
Occasional · medium severity
Typical onset: 50,000-90,000 mi
Symptoms: Rough idle, cylinder misfires, Loss of power under load, P030X misfire codes specific to one or more cylinders, Increased fuel consumption
Fix: High-pressure direct injectors fail electrically or mechanically stick open/closed. Replace all four at once to avoid repeat labor. Includes decarbonizing intake valves (direct injection carbon buildup issue). 3-4 hours labor.
Estimated cost: $1,400-2,200
Electric Water Pump Failure
Occasional · high severity
Typical onset: 80,000-120,000 mi
Symptoms: Overheating warning on dash, Coolant warning light, Whining or grinding noise from front of engine, No heat from cabin vents despite warm engine
Fix: Electric pump impeller fails or motor burns out. Engine will overheat quickly without warning. Replacement is straightforward but must bleed system properly. 2-3 hours labor. Often done with thermostat and expansion tank as preventive bundle.
Symptoms: Top operates slowly or stops mid-cycle, Hydraulic fluid stains on trim panels or carpet, Top mechanism error messages on iDrive, Pump runs continuously without moving top
Fix: Rubber hydraulic lines crack from age/heat cycles. Requires line replacement and system bleed. Labor-intensive due to trim removal. 4-6 hours depending on which lines fail. Pump itself ($800-1,200 part) occasionally fails too.
Avoid N20 2.0T engines entirely unless timing chain service is documented before 60k miles—this is not a 'maybe' failure, it's 'when.'
Change transmission fluid every 40-50k miles despite BMW 'lifetime' claims—prevents cooler contamination damage.
Perform walnut blasting on intake valves every 50-60k miles (direct injection carbon issue on both engines).
Inspect PCV system and replace valve cover proactively at 70k miles to prevent seal damage.
Service convertible top annually: lubricate pivot points, inspect lines, cycle top through full operation to catch issues early.
Buy the 3.0L six-cylinder models only—N52 or N55 are proven reliable; avoid N20 turbo-four unless you enjoy surprise engine rebuilds. Otherwise a great driving platform if maintained properly.
AI-assisted summary drawn from NHTSA recall data, our labor-times database, and platform knowledge. Not a substitute for a pre-purchase inspection on a specific vehicle.
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BMW of North America, LLC (BMW) is recalling certain 2010-2012 1 Series Coupe, 1 Series Convertible, 3 Series Sedan, 3 Series Convertible, 2010-2011 3 Series Sportswagon, 3 Series Coupe, 5 Series Sedan, X3 xDrive 28i, X3 xDrive 30i, X5 xDrive30i, and Z4 sDrive30i vehicles. The aluminum bolts that secure the housing for the variable camshaft timing adjustment (VANOS) unit can loosen over time and possibly break.
Consequence: Loose or broken VANOS unit bolts can result in an engine stall, increasing the risk of a crash.
Remedy: Dealers will replace the four VANOS bolts, free of charge. Interim letters notifying owners of the safety risk are expected to be mailed December 18, 2023. Owner notification letters were mailed June 19, 2024. Owners may contact BMW customer service at 1-800-525-7417.
ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CRANKCASE (PCV) · 22V119000
2022-03-02
BMW of North America, LLC (BMW) is recalling certain 2008-2013 1 Series Coupe (128i); 2007-2013 3 Series Coupe (328i, 328xi, 328i xDrive); 2007-2010 X3 SAV (X3 3.0si, X3 xDrive30i); 2008-2013 1 Series Convertible (128i); 2006-2011 3 Series Sedan (325i, 325xi, 328i, 328xi, 328i xDrive, 330i, 330xi); 2006-2012 3 Series Wagon (328i, 328i xDrive); 2007-2013 3 Series Convertible (328i); 2006-2010 5 Series Sedan (525i, 525xi, 528i, 528xi, 530i, 530xi); 2006-2007 5 Series Wagon (530xi); 2007-2010 X5 SAV (X5 3.0si, X5 xDrive30i); 2006-2008 Z4 Coupe (Z4 3.0si); and 2006-2011 Z4 Roadster (Z4 3.0i, Z4 3.0si, Z4 sDrive30i) vehicles. The heater for the positive crankcase ventilation (PCV) valve may short circuit.
Consequence: An electrical short can cause the PCV valve heater to overheat, increasing the risk of a fire while driving or, soon after driving when parked.
Remedy: This recall supersedes and expands previous NHTSA recalls 17V-683 and 19V-273. Dealers will install an electrical wiring harness with fuse protection for the PCV Valve heater in potentially affected vehicles, free of charge. This recall supersedes and expands previous NHTSA recalls 17V-683 and 19V-273. Vehicles previously repaired under the prior recalls will need to come back for the new recall remedy. The remedy is currently being developed. Interim owner notification letters informing owners of the safety risk were mailed on April 1, 2022. Owner notification letters were mailed on July 22, 2022. Owners may contact BMW customer service at 1-800-525-7417.
ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CRANKCASE (PCV) · 17V683000
2017-10-30
BMW of North America, LLC (BMW) is recalling certain 2008-2011 128i and 2007-2011 328i, 328xi, 328i xDrive, 525i, 525xi, 528i, 528xi, 530i, 530xi, X3 3.0si, X3 xDrive30i, X5 xDrive30i, Z4 3.0i, Z4 3.0si and Z4 sDrive30i vehicles. The heater for the positive crankcase ventilation (PCV) valve may short circuit.
Consequence: An electrical short can cause the parts within the PCV valve to melt, increasing the risk of a fire, even when the vehicle is not in use.
Remedy: BMW will notify owners, and dealers will replace the PCV valve heater, free of charge. Interim letters were mailed on November 27, 2017. Owners will receive a second notification by the end of October 2018. Owners may contact BMW customer service at 1-800-525-7417.
POWER TRAIN:DRIVELINE:CONSTANT VELOCITY JOINT · 17V067000
2017-02-02
BMW of North America, LLC (BMW) is recalling certain 2011-2012 135i Coupe, 1 Series M Coupe and 135i Convertible vehicles, 2011 Z4 sDrive 35i, 335i, 335d, 335i Coupe, 335is Coupe, 335i Convertible, 335is Convertible, 535i, 535i xDrive, 535i Gran Turismo and 550i xDrive Gran Turismo vehicles and 2012 740i and 740Li vehicles. The rear driveshaft constant velocity (CV) joint on the affected vehicles may fatigue and break.
Consequence: If the CV joint breaks, the vehicle may have a loss of propulsion, increasing the risk of a crash.
Remedy: BMW will notify owners, and dealers will inspect the rear driveshaft CV joint and, based on its production date, will replace it, free of charge. The recall began April 21, 2017. Owners may contact BMW customer service at 1-800-525-7417.
ENGINE AND ENGINE COOLING:ENGINE · 14V176000
2014-04-10
BMW of North America, LLC (BMW) is recalling certain model year 2010-2011 128i Coupe, 128i Convertible, 328i Sedan, 328i xDrive Sedan, 328i Coupe, 328i Convertible, 328i Sports Wagon and Z4 sDrive 30i, 2011-2012 135i Coupe, 135i Convertible, 335i Sedan, X5 xDrive 35i, and X6 xDrive 35i, 2011 335i xDrive Sedan, 335i Coupe, 335i Convertible, 528i Sedan, 535i Sedan, 535i xDrive Sedan, X3 xDrive 28i, and X3 xDrive 35i, 2010 X3 xDrive 30i, and X5 xDrive 30i, 2012 640i Coupe, and 640i Convertible and 2010-2012 535i Gran Turismo vehicles. In the affected vehicles, the bolts that secure the housing for the variable camshaft timing adjustment (VANOS) unit can loosen over time and may possibly break.
Consequence: If the bolts loosen or break the engine may have reduced power or stall. An engine stall increases the risk of a crash.
Remedy: BMW will notify owners, and dealers will replace the four VANOS housing bolts for both VANOS units (intake and exhaust), free of charge. In addition, owners of approximately 170,172 model year 2010-2012 BMW vehicles equipped with inline 6 cylinder engines not covered by this recall, will receive an extended warranty to address this condition. The recall began on September 24, 2014. Owners may contact BMW at 1-800-525-7417.
ELECTRICAL SYSTEM · 13V044000
2013-02-07
BMW is recalling certain model year 2008-2012 1-Series coupes and convertibles manufactured December 2007 through September 2011; and 2007-2011 3-Series coupes and convertibles manufactured March 2007 through October 2011; 2007-2011 3-Series sedans manufactured March 2007 through October 2011; 2007-2011 3-Series sports wagons manufactured March 2007 through June 2011; and 2009-2011 Z4 vehicles manufactured March 2009 through June 2011. In February 2013, BMW recalled 504,545 vehicles. In July 2013, BMW informed the agency that it was adding 1-Series, 3-Series, and Z4 vehicles, representing an additional 12,094 vehicles. The total number of vehicles being recalled is now 516,791. The connector for the positive battery cable connector and the corresponding terminal on the fuse box may degrade over time. Over time, the high current flow and heat from electrical resistance may lead to a breakage of the connection, and a loss of electrical power to the vehicle.
Consequence: If there is a loss of electrical power to the vehicle, the vehicle may unexpectedly stall, increasing the risk of a crash.
Remedy: BMW will notify owners, and dealers will replace the positive battery cable connector and secure it with an improved method, free of charge. The recall began on March 13, 2013. Owners may call BMW at 1-800-525-7417 or email BMW at [email protected].
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