Unregistered replacement battery
Attaches to E9X at chassis level · Electrical · carried by 65 variants across 4 chassis
Overview
Unregistered replacement battery is a common fault recorded against E9X at chassis level, at any age. It shows up as random electrical faults, warning lights that come and go, a battery that dies again within a year. Where it's documented, the repair runs €30–€60 (coding at an independent, costs dated 2026-07), and it can be partly checked before you buy. 65 variants across 4 chassis in this database inherit it.
What happens
Symptom. Random electrical faults, warning lights that come and go, a battery that dies again within a year.
Cause. The car's power management must be told a new battery was fitted. Cheap replacements are routinely fitted without coding, which then overcharges or undercharges the new battery.
How to check it
Paperwork
Ask when the battery was changed and whether it was registered. A car with a new battery, no registration and a scatter of odd electrical faults usually just needs coding.
On these cars the folder is most of the value.
Every variant that carries this
| Variant | Chassis | Body | Years | Risk | Good buy | Cost as % of good buy |
|---|---|---|---|---|---|---|
| 318i N46 | E90 | sedan | 2005–2011 | R3 | €3,100 | 1% |
| 318i N46 | E91 | wagon | 2005–2011 | R3 | €3,300 | 1% |
| 320i N46 | E90 | sedan | 2005–2007 | R3 | €3,400 | 1% |
| 320i N46 | E91 | wagon | 2005–2007 | R3 | €3,600 | 1% |
| 320i N43 | E90 | sedan | 2007–2011 | R4 | €3,950 | 1% |
| 320i N43 | E91 | wagon | 2007–2011 | R4 | €4,200 | 1% |
| 320i N43 | E92 | coupe | 2007–2011 | R4 | €4,550 | 1% |
| 320i N43 | E93 | convertible | 2007–2011 | R4 | €4,450 | 1% |
| 323i N52 | E90 | sedan | 2005–2007 | R2 | €4,050 | 1% |
| 323i N52 | E91 | wagon | 2005–2007 | R2 | €4,300 | 1% |
| 323i N52 | E92 | coupe | 2006–2007 | R2 | €4,650 | 1% |
| 325i N52 | E90 | sedan | 2005–2007 | R2 | €4,750 | 1% |
| 325i N52 | E91 | wagon | 2005–2007 | R2 | €5,050 | 1% |
| 325i N52 | E92 | coupe | 2006–2007 | R2 | €5,450 | 1% |
| 325i N52 | E93 | convertible | 2007 | R2 | €5,350 | 1% |
| 325i N53 | E90 | sedan | 2007–2011 | R4 | €5,250 | 1% |
| 325i N53 | E91 | wagon | 2007–2012 | R4 | €5,550 | 1% |
| 325i N53 | E92 | coupe | 2007–2013 | R4 | €6,050 | 1% |
| 325i N53 | E93 | convertible | 2007–2013 | R4 | €5,900 | 1% |
| 328i N52 | E90 | sedan | 2006–2011 | R2 | €5,150 | 1% |
| 328i N52 | E91 | wagon | 2006–2012 | R2 | €5,450 | 1% |
| 328i N52 | E92 | coupe | 2006–2013 | R2 | €5,950 | 1% |
| 328i N52 | E93 | convertible | 2007–2013 | R2 | €5,750 | 1% |
| 330i N52 | E90 | sedan | 2005–2007 | R2 | €5,600 | 1% |
| 330i N52 | E91 | wagon | 2005–2007 | R2 | €5,950 | 1% |
| 330i N52 | E92 | coupe | 2006–2007 | R2 | €6,450 | 1% |
| 330i N53 | E90 | sedan | 2007–2011 | R4 | €6,000 | 1% |
| 330i N53 | E91 | wagon | 2007–2011 | R4 | €6,350 | 1% |
| 330i N53 | E92 | coupe | 2007–2011 | R4 | €6,900 | 1% |
| 330i N53 | E93 | convertible | 2007–2011 | R4 | €6,750 | 1% |
| 335i N54 | E90 | sedan | 2006–2010 | R4 | €7,350 | 1% |
| 335i N54 | E92 | coupe | 2006–2010 | R4 | €8,450 | 1% |
| 335i N54 | E93 | convertible | 2007–2010 | R4 | €8,250 | 1% |
| 335i N55 | E90 | sedan | 2010–2011 | R3 | €11,700 | 0% |
| 335i N55 | E92 | coupe | 2010–2013 | R3 | €13,450 | 0% |
| 335i N55 | E93 | convertible | 2010–2013 | R3 | €13,100 | 0% |
| 316d N47 | E90 | sedan | 2009–2011 | R5 | €4,200 | 1% |
| 316d N47 | E91 | wagon | 2009–2011 | R5 | €4,450 | 1% |
| 318d N47 | E90 | sedan | 2007–2011 | R5 | €4,100 | 1% |
| 318d N47 | E91 | wagon | 2007–2011 | R5 | €4,350 | 1% |
| 320d M47 | E90 | sedan | 2005–2007 | R3 | €3,800 | 1% |
| 320d M47 | E91 | wagon | 2005–2007 | R3 | €4,050 | 1% |
| 320d N47 | E90 | sedan | 2007–2011 | R5 | €4,400 | 1% |
| 320d N47 | E91 | wagon | 2007–2012 | R5 | €4,650 | 1% |
| 320d N47 | E92 | coupe | 2007–2013 | R5 | €5,050 | 1% |
| 320d N47 | E93 | convertible | 2007–2013 | R5 | €4,950 | 1% |
| 325d M57 | E90 | sedan | 2006–2010 | R2 | €5,200 | 1% |
| 325d M57 | E91 | wagon | 2006–2010 | R2 | €5,500 | 1% |
| 325d M57 | E92 | coupe | 2006–2010 | R2 | €6,000 | 1% |
| 325d N57 | E90 | sedan | 2010–2011 | R3 | €7,200 | 1% |
| 325d N57 | E91 | wagon | 2010–2012 | R3 | €7,650 | 1% |
| 325d N57 | E92 | coupe | 2010–2013 | R3 | €8,300 | 1% |
| 330d M57 | E90 | sedan | 2005–2008 | R2 | €5,950 | 1% |
| 330d M57 | E91 | wagon | 2005–2008 | R2 | €6,300 | 1% |
| 330d M57 | E92 | coupe | 2006–2008 | R2 | €6,850 | 1% |
| 330d M57 | E93 | convertible | 2007–2008 | R2 | €6,700 | 1% |
| 330d N57 | E90 | sedan | 2008–2011 | R3 | €8,500 | 1% |
| 330d N57 | E91 | wagon | 2008–2012 | R3 | €9,050 | 0% |
| 330d N57 | E92 | coupe | 2008–2013 | R3 | €9,000 | 1% |
| 330d N57 | E93 | convertible | 2008–2013 | R3 | €8,750 | 1% |
| 335d M57 | E90 | sedan | 2006–2010 | R3 | €6,900 | 1% |
| 335d M57 | E92 | coupe | 2006–2010 | R3 | €7,950 | 1% |
| M3 S65 | E90 | sedan | 2007–2011 | R4 | €35,700 | 0% |
| M3 S65 | E92 | coupe | 2007–2013 | R4 | €35,000 | 0% |
| M3 S65 | E93 | convertible | 2007–2013 | R4 | €30,800 | 0% |
The last column is the point. The same repair is an inconvenience on one variant and a reason to scrap the car on another. A failure costing a quarter of the vehicle's value changes the purchase decision regardless of how rare it is.