M97 vs 9A1/MA1
Side-by-side reliability comparison
Higher reliability score
9A1/MA1
BUY
82/100
+14 points over M97
0
/ 100
ACCEPTABLE
M97
Porsche
0
/ 100
BUY
9A1/MA1
Porsche
Specifications
M97
9A1/MA1
Brand
Porsche
Porsche
Verdict
ACCEPTABLE
BUY
Reliability
68
82
Years
2005--2012
2008--2019
Displacement
3800 cc
3800 cc
Layout
F6
F6
Type
Petrol Na
Petrol Na
Power
325--385 hp
350--400 hp
Known Issues
1
1
Total Risk Cost
€3,000--€10,000
€0--€0
Character
M97
"997 Carrera. IMS issue mostly solved in 2006+ (larger bearing). Bore scoring still possible but less common. More refined than M96. DFI on later 997.2 (MA1 series) eliminated IMS entirely."
9A1/MA1
"991 Carrera NA and 997.2. Direct fuel injection. No IMS bearing. No bore scoring concern. Porsche's most reliable modern flat-6. Oil separator system improved. Excellent longevity."
Issues Comparison
M97 1
● MODERATE
Bore scoring (reduced but possible)
9A1/MA1 1
○ MINOR
No significant design flaws known