BMW E46 3 Series convertible and M3, final 2006 models buyer's guide

Models and engines by year

US-market models. Chassis codes: E46. Not sure which one you have? The VIN check decodes year, model and engine.

Model-year changes

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.

M54 engine

325Ci convertible (2006), 330Ci convertible (2006)

S54 engine

M3 coupe and convertible (2006)

Known E46 issues beyond the engine

Rear subframe mount cracking. Affects every E46 year and model. The sheet-metal floor around the rear subframe mounts cracks, often with few symptoms beyond clunks or creaks from the rear.²

Cooling system. Expansion tanks crack and water pumps fail. Thermostats and belt pulleys tend to fail around 60,000–75,000 miles.²

DISA valve. Typically good for about 75,000–100,000 miles. On M54 engines the whole unit usually needs replacing.²

Rust. Mostly cosmetic, but the rear subframe mounting points can rust structurally.²

Warranty extensions and service campaigns 6

Warranty extensions (6)

• SIB 01 20 16 Electrical system service information Electrical system service information on BMW E46/E70/E71/E72 and other models (2006–2014); BMW extended coverage for eligible cars. Warranty extension · May 2026
• SIB 01 16 18 Airbag class-action settlement Airbag class-action settlement on BMW E46/E53/E70/E71 and other models (2006–2015); covers eligible repairs and reimbursement under the court settlement. Service bulletin · Jan 2019
• 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 12 14 Throttle warranty extension Throttle warranty extension on M57 engines (2006–2011); BMW extended the warranty on this part for eligible cars. Service bulletin · Nov 2014
• 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 9

• Jul 3, 2024
  Recall 24V513: driver air bag module 325I, 328I, 330I, 335D, 335I, 2006–2012. The original steering wheel may have been replaced with a sport or M-sport steering wheel equipped with an inflator that can explode during deployment.
• Jan 15, 2020
  Recall 20V017: inflator module 1 SERIES M, 128I, 135I, 325I, 328I, 330I, 335D, 335I, 335IS, M3, X1, X3, X5, X6, X6 ACTIVEHYBRID, 2006–2015. These inflators may explode due to propellant degradation occurring after long-term exposure to high absolute humidity, high temperatures, and high temperature cycling.
• Jan 15, 2020
  Recall 20V018: inflator module 325CI, 330CI, M3, 2006. These inflators may explode due to propellant degradation occurring after long-term exposure to high absolute humidity, high temperatures, and high temperature cycling.
• Apr 4, 2019
  Recall 19V273: crankcase (PCV) 325I, 330I, 525I, 530I, Z4, 2006. 0i and Z4 3.0si vehicles.
• Jun 11, 2018
  Recall 14V428: air bags 325I, 330I, M3, 2006.
• Oct 25, 2017
  Recall 17V676: wiring 325I, 328I, 330I, 335D, 335I, 335IS, M3, 2006–2011. The wiring and electrical connectors for the system that controls air flow for the heating and air conditioning system may overheat.
• Jul 6, 2017
  Recall 17V428: occupant classification 325I, 330I, 525I, 530I, 550I, 2006. BMW of North America, Inc. (BMW) is recalling certain 2006 325i, 325xi, 330i, 330xi, 525i, 525xi, 530i, 530xi, and 550i vehicles equipped with the Sport Seat option and certain 2006 525i, 525xi, 530i, 530xi, 550i vehicles with standard seats.
• May 28, 2015
  Recall 15V318: inflator module 325CI, 330CI, M3, 2006. 0i and 4.4i Sports Activity Vehicles.
• Nov 12, 2013
  Recall 13V564: occupant classification 325I, 328I, 330I, 335I, 525I, 530I, 550I, 750I, 750LI, 760I, 760LI, X5, 2006–2007. BMW of North America LLC (BMW) is recalling certain model year 2006 325i, 325xi, 330i, 330xi sedans and 325xi sports wagons, model year 2007 328i, 328xi, 335i, 335xi sedans and 328i and 328xi sports wagons, model year 2006-2007 525i, 525xi, 530i, 530xi, 550i sedans and 530xi sports wagons, model yea

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

1. 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.⁷
2. 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.^8,9
3. 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.^8,10,11
4. 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.
5. 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.^4,8
6. Inspect the rear subframe mounts. Look for visible cracks around the mounts under the trunk floor and listen for rear clunks.²
7. Cooling system records. A full cooling refresh at 60,000–75,000 miles is recommended.²

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.^11,12
• 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.
• M54: ask for records of Cooling system (water pump, thermostat, expansion tank, hoses, radiator); CCV (crankcase ventilation); Valve cover gasket, oil filter housing gasket and DISA valve; Oil pump nut.
• 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.

E46 specs

A manual gearbox was offered in model years 2006 (EPA listings). Full E46 specs: every US engine, transmission and drive by year →

Coding

The coding apps' own lists show 148 settings that owners can change on the E46 with a phone and an OBD adapter, in areas such as Opening, Power Windows, Locking, Alarm System, Cleaning, Coming Home. 148 more appear only in Carly's list.

Full E46 coding list with tool, difficulty and caveats →

Ownership costs

Routine maintenance: oil service prices by engine size, published BMW Value Service prices (brakes, spark plugs) from 16 US dealers, and the E46 maintenance schedule.

By model year

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

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

1. BMWTuning: 5 most common M54 problems
2. BMWTuning: E46 common problems guide
3. E46Fanatics: in-depth maintenance guide
4. Road & Track: E46 M3 buyer's guide
5. Classics World: E46 M3 buyer's guide
6. Wikipedia: BMW 3 Series (E46)
7. NHTSA recall lookup by VIN
8. The Stable: E92 M3 buyer's guide
9. Euro Premium Parts: E60 M5 reliability guide
10. carsales: buying a used F30 3 Series (2015–20)
11. carsales: buying a used E90 3 Series
12. 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.

More for the E46

E46 repair costs and recalls E46 common problems E46 maintenance schedule Used BMW VIN check