002A87

What Code 002A87 Means

Code 002A87 (VANOS-Mechanik) points to a fault in the mechanical side of the VANOS system, BMW's variable camshaft timing setup. According to the source data, the code may be tied to the VANOS unit (Verstelleinheit).

VANOS controls camshaft position relative to the crankshaft through hydraulic mechanisms. The VANOS unit (Verstelleinheit) is the actuator that actually changes the timing. A mechanical fault can show up as noise, juddering, and power loss.

The source data has no detailed technical description of this code, so the information here is limited to the reference to the VANOS unit.

Symptoms

• Slight juddering (Ruckeln) in 3rd gear while driving down a gentle slope at idle.
• After the repair and a drive: idle briefly rises to about 1000 rpm, then drops to 640 rpm with a short judder.
• After clearing the faults: noticeable power limitation and juddering/hesitation under acceleration around 3000 rpm.

Diagnosis and Repair

The source data gives no separate fix specific to code 002A87. The context does describe work that was carried out and may be related to resolving the cause:

• Replaced the large DISA flap (DISA Klappe groß) — found cracked.
• Replaced the small DISA flap (DISA Klappe klein).
• Full replacement of the crankcase ventilation valve (KGE komplett neu).
• The VANOS solenoids were replaced earlier (OEM) and ruled out as a possible cause.

For an accurate diagnosis of code 002A87, check the mechanical condition of the VANOS unit (Verstelleinheit) and confirm the related components are working. Use BMW diagnostic equipment (ISTA, INPA) for more information and to run VANOS tests.