NHTSA Service Bulletin 10147598: 2002-2010 BMW 525i
Official manufacturer communication context for 2002-2010 BMW 525i, with affected products, buyer checks and links into Carchieve recall, problem and VIN research.
Reviewed June 2026 from NHTSA manufacturer communication and service bulletin records. Carchieve is independent and not affiliated with any vehicle manufacturer or government agency.
"SUBJECT N62TU: ISTA Service Function for DME ""RAM Backup"". The ISTA Service Function test plan should be performed to clear stored values in the DME RAM memory after repairs are completed, in the following situations: z VANOS or engine-related repairs if any of the following faults cannot be cleared: 2A90 - Exhaust camshaft, tooth offset to crankshaft 2A91 - Exhaust camshaft 2, tooth offset to crankshaft 2A8A - Inlet VANOS, adaptation stop 2A8B - Inlet VANOS, adaptation stop 2 2A8C - Exhaust VANOS, adaptation stop 2A8D - Exhaust VANOS, adaptation stop 2 2A8E - Inlet camshaft, tooth offset to crankshaft 2A8F - Inlet camshaft 2, tooth offset to crankshaft z The engine oil level display continues to show as overfilled even after being corrected. This is also described in SI B12 05 07."
What this bulletin may mean before buying
Treat this as service research, not a verdict on one car. Before you buy, compare this communication with official recall campaigns, model-level owner complaint patterns, and the exact vehicle’s VIN-decoded specifications. A bulletin can help you ask a seller or dealer sharper questions about software updates, known repairs, warranty extensions and service history.
Affected products listed in this communication
Buyer checklist
- Run the 17-character VIN and confirm the year, make, model, engine and equipment match the listing.
- Check recall campaign pages for safety actions that may require dealer repair.
- Compare this bulletin with common problem pages for the same model and component area.
- Ask the seller or dealer whether the bulletin procedure, update or inspection has already been completed.
- Use the used-car buying checklist and get an independent inspection.
Frequently asked questions
What is NHTSA service bulletin 10147598?
"SUBJECT N62TU: ISTA Service Function for DME ""RAM Backup"". The ISTA Service Function test plan should be performed to clear stored values in the DME RAM memory after repairs are completed, in the following situations: z VANOS or engine-related repairs if any of the following faults cannot be cleared: 2A90 - Exhaust camshaft, tooth offset to crankshaft 2A91 - Exhaust camshaft 2, tooth offset to crankshaft 2A8A -.
Is a service bulletin the same as a recall?
No. A recall is a safety campaign with a required remedy for affected VINs. A service bulletin or manufacturer communication usually describes diagnostic, repair, software, warranty or service information.
How should a used-car buyer use this bulletin?
Use it as a research signal. Compare it with recalls, owner complaints, service records, a VIN report and an independent inspection before buying.
Check the exact VIN before you buy
Model-level pages show public safety patterns. A full VIN report helps confirm the exact vehicle, decoded specs, recall applicability and buyer checks.
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