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BMW E85 Z4 and Z4 M buyer's guide
2006–2008 · 3.0i / 3.0si roadster and coupe, Z4 M roadster and coupe (N52, S54)
Last updated
Engines by year Model-year changes Known problems Warranty extensions Recalls Inspection checklist Red flags Specs Coding Ownership costs Production Sources
Models and engines by year
| Model | US model years | Engine |
|---|---|---|
| 3.0i / 3.0si roadster and coupe | 2006–2008 | N52 |
| Z4 M roadster and coupe | 2006–2008 | S54 |
US-market models. Chassis codes: E85, E86. Not sure which one you have? The VIN check decodes year, model and engine.
Model-year changes
| Model year | What changed |
|---|---|
| Facelift (LCI) | Facelift launched at the January 2006 Detroit show; the coupe (E86) went on sale late May 2006. US models over the run included the 2.5i and 3.0i roadsters, the 3.0si roadster and coupe, and the M roadster and coupe.7 |
| 2006 | US lineup in the EPA listings: 3.0L 6-cyl: Z4 3.0i, Z4 3.0si, Z4 3.0si Coupe; 3.2L 6-cyl: Z4 M Coupe, Z4 M Roadster.8 |
| 2007 | New: Z4 Coupe (3.0L 6-cyl). No longer listed: Z4 3.0si Coupe.8 |
| End | North American coupe production totalled 3,919 (1,815 M Coupes); the M Coupe was manual only.7 |
US model years unless noted. "LCI" (Life Cycle Impulse) is BMW's name for a mid-cycle facelift.
Known problems and when they show up
Mileages are what the cited shops, specialists and owner forums report. They are typical ranges, not predictions for any one car.
N52 engine
3.0i / 3.0si roadster and coupe (2006–2008) · N52 bulletins
| Problem | When it shows up | What to know | Repair prices |
|---|---|---|---|
| Electric water pump and thermostat | about 60,000–100,000 miles | Overheating and limp mode. Replace the thermostat at the same time.1,2,3 | N52 / N54 / N55 electric water pump + thermostat |
| VANOS solenoids | about 70,000–130,000 miles | Rough cold idle, loss of power and codes 2A82/2A87.1,2 | VANOS solenoids (intake / exhaust) |
| Hydraulic lifter tick | usually 50,000 miles and up; 2008 and earlier | A tick on cold starts. It is annoying rather than harmful. BMW changed the lifters and head in December 2008, which fixed it.1 | No price yet |
| Valve cover and oil filter housing gasket leaks | about 60,000–100,000 miles | Oil smell and residue on top of the engine. A leaking oil filter housing can soak the belt.2,1 | No price yet |
S54 engine
Z4 M roadster and coupe (2006–2008)
| Problem | When it shows up | What to know | Repair prices |
|---|---|---|---|
| Rod bearings (pre-2003 cars) | early cars: check the recall; many owners treat later bearings as a wear item | Road & Track says BMW recalled 2001–2003 model-year M3s because the rod bearings were incorrectly sized. Classics World advises checking the history for proof the bearing fix was done on pre-2003 cars.4,5 | No price yet |
| VANOS rattle | age and mileage | Classics World says the S54 is not especially prone to VANOS trouble, but specialists can rebuild a rattling unit.5 | No price yet |
| Rear subframe mount cracking (E46 chassis) | age and power related | Cracks can hide under the car. Have a specialist inspect it, and ask whether reinforcement was done.4,5,6 | No price yet |
| SMG II hydraulic pump | age | The hydraulic pump can cause gear-selection problems, and clutch wear and judder are reported. Most buyers prefer the six-speed manual.4,5 | No price yet |
| Limited-slip differential noise | any | The diff can groan in tight turns. Fresh fluid with the right friction modifier can help; also check the shaft seals for leaks.5 | No price yet |
Warranty extensions and service campaigns 3
Warranty extensions (3)
- SIB 01 01 18 Seat warranty extension Seat warranty extension on BMW E46/E60/E61/E83 and other models (2006); BMW extended the warranty on this part for eligible cars. Service bulletin · Jan 2018
- SIB 01 02 12 Turbo wastegate warranty extension Turbo wastegate warranty extension on BMW E46/E60/E61/E71 and other models (2006–2014); BMW extended the warranty on this part for eligible cars. Service bulletin · Jun 2013
- NHTSA 10150095 Warranty extension noise Warranty extension noise on BMW E46/E60/E61/E70 and other models (2006–2009); BMW extended the warranty on this part for eligible cars. Service bulletin · Mar 2013
Filed by BMW with NHTSA. Extensions usually follow the car to later owners and can reimburse earlier repairs; a BMW dealer can confirm by VIN.
NHTSA safety recalls 3
- Recall 22V119: PCV valve heater 128I, X3 SAV, X5 SAV, Z4, 2006–2013. 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
- Recall 19V273: crankcase (PCV) 325I, 330I, 525I, 530I, Z4, 2006. 0i and Z4 3.0si vehicles.
- Recall 17V683: crankcase (PCV) 128I, 328I, 525I, 528I, 530I, X3, X5, Z4, 2007–2011. 0si, X3 xDrive30i, X5 xDrive30i, Z4 3.0i, Z4 3.0si and Z4 sDrive30i vehicles.
Matched from NHTSA's public recall file by model and model year. A recall may cover only some cars from a year, and it may already have been done on yours. Check by VIN →
Test drive and inspection checklist
- Run the VIN for open recalls. Open safety recalls are free at any BMW dealer. Check on NHTSA's site or our recall page before you buy.9
- Scan for stored fault codes with a BMW-capable tool. A generic OBD reader misses most BMW modules. Specialist guides recommend a BMW-level scan (ISTA or similar) to catch faults that have been cleared from the dash but still stored.10,11
- Start it from cold. Ask the seller not to warm the car up first. Chain rattle, VANOS rattle, lifter tick and rough idle show most clearly in the first seconds after a cold start.10,12,13
- Ask a BMW dealer about warranty extensions and campaigns. Several BMW warranty extensions follow the car, not the owner, and some reimburse earlier repairs. A dealer can check the VIN. The list for this chassis is below.
- Get a pre-purchase inspection from a BMW specialist. A few hundred dollars for an independent BMW specialist is the usual advice, especially for M cars and high-mileage turbo engines.4,10
Engine items to listen and look for are in the known problems section.
Service-history red flags
- Oil changes only at the long computer interval. Several guides advise changing oil more often than the onboard service indicator (CBS) suggests, especially with lots of city driving.13,14
- Gaps in the records around known failure mileages. If the engine section below lists a job that usually comes due at the car's mileage, ask for the invoice. A missing record isn't proof it wasn't done, but it is a negotiating point.
- Tuned or "deleted" cars. Tunes, emissions deletes and removed parts complicate warranty claims and inspections and raise wear on turbo cars. Ask, and look for aftermarket intakes, downpipes and charge pipes.
- N52: ask for records of Electric water pump and thermostat; VANOS solenoids; Hydraulic lifter tick; Valve cover and oil filter housing gasket leaks.
- S54: ask for records of Rod bearings (pre-2003 cars); VANOS rattle; Rear subframe mount cracking (E46 chassis); SMG II hydraulic pump; Limited-slip differential noise.
E85 specs
A manual gearbox was offered in model years 2006–2008 (EPA listings). Full E85 specs: every US engine, transmission and drive by year →
Coding
The coding apps' own lists show 118 settings that owners can change on the E85 with a phone and an OBD adapter, in areas such as Locking, Alarm System, Cleaning, Opening, Power Windows, Coming Home. 118 more appear only in Carly's list.
Ownership costs
Routine maintenance: oil service prices by engine size, published BMW Value Service prices (brakes, spark plugs) from 16 US dealers, and the E85 maintenance schedule.
Repairs we price that apply to the E85
| Repair and owner-reported prices |
|---|
| N52 / N54 / N55 electric water pump + thermostat |
| VANOS solenoids (intake / exhaust) |
"Owners paid" is the middle 50% of sourced owner prices across chassis with the same engine. Each job page reprices for your ZIP.
By model year
| Year | Models and engines | NHTSA recalls | Warranty extensions | Repairs we price |
|---|---|---|---|---|
| 2006 | 3.0i / 3.0si roadster and coupe N52 Z4 M roadster and coupe S54 | 2 | 3 | 2 |
| 2007 | 3.0i / 3.0si roadster and coupe N52 Z4 M roadster and coupe S54 | 2 | 2 | 2 |
| 2008 | 3.0i / 3.0si roadster and coupe N52 Z4 M roadster and coupe S54 | 2 | 2 | 2 |
Recalls and warranty extensions are counted when their published model-year range includes that year. Each one may cover only some cars, so check by VIN. Repairs counted are the ones whose engine was offered that year.
Production
| What | Units | Source |
|---|---|---|
| Z4 (E85/E86), total built 180,856 roadsters and 17,094 coupes | 197,950 | Automotive World |
Figures are copied as each source publishes them (retrieved October 18, 2026). "Sold" figures are BMW's reported sales, not production counts. Where we add numbers up, they come from one source. We leave out anything that hasn't been published.
Sources
- BMWTuning: 7 most common N52 problems
- Euro Premium Parts: N52 engine guide
- AmpAuto: N52 problems
- Road & Track: E46 M3 buyer's guide
- Classics World: E46 M3 buyer's guide
- BMWTuning: E46 common problems guide
- Wikipedia: BMW Z4 (E85)
- EPA/DOE fuel economy data (fueleconomy.gov)
- NHTSA recall lookup by VIN
- The Stable: E92 M3 buyer's guide
- Euro Premium Parts: E60 M5 reliability guide
- carsales: buying a used F30 3 Series (2015–20)
- carsales: buying a used E90 3 Series
- Drive-My: E60 5 Series buying guide (six-cylinder petrol)
Retrieved 2026-10-18. Bulletins and recalls come from NHTSA filings; owner prices come from the public posts linked on each job page.