"What are the common issues with the 12C's gearbox and how much does it cost to fix?"

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Based on my research, here are the common gearbox issues with the 2013 McLaren MP4-12C and their repair costs:

**Common Issues:**
1. **Hydraulic pump failures** - The SSG (Seamless Shift Gearbox) relies on hydraulic pressure, and pump failures can cause complete transmission malfunction
2. **Actuator seal leaks** - These tend to leak when hot, causing reverse gear to lose clutch pressure and potentially stalling the engine
3. **Clutch position sensor drift** - The sensors within the clutch actuator assembly can fail, causing erratic shifting behavior
4. **Internal gearbox leaks** - Oil leaks from the gearbox itself, often requiring significant repair work
5. **Limp mode activation** - The transmission may go into limp mode, causing rough shifting and reduced performance

**Repair Costs:**
- **Minor repairs** (seal replacements, small fixes): $2,000-$4,000
- **Major repairs** (hydraulic system, actuators): $8,000-$15,000
- **Complete transmission replacement** (dealer): Up to $65,000
- **Used transmission units**: Around $10,000-$11,000
- **Specialist rebuild services**: Typically $15,000-$25,000

**Key Points:**
- The SSG is a complex dual-clutch system that requires specialized McLaren knowledge
- Many issues stem from hydraulic system problems
- Regular maintenance of clutch and transmission fluid can help prevent some issues
- McLaren specialists often offer more cost-effective solutions than dealerships

Given that your 2013 MP4-12C has about 20,000 miles, it's in the range where some of these issues might start appearing. I'd recommend having a McLaren specialist inspect the transmission if you notice any rough shifting, limp mode, or fluid leaks.

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Lot M1001553: 2013 McLaren MP4-12C

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Lot M1001553: 2013 McLaren MP4-12C

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