The front halfshaft is the critical bridge between your Tesla Model Y’s front drive unit and wheels, translating electric motor torque into smooth, responsive motion. The 1188115-99-A Front Halfshaft Assembly—engineered specifically for Model Y—delivers this power with uncompromising precision, thanks to its 25mm diameter and 565mm length that perfectly match the vehicle’s front drivetrain geometry.
Tesla’s instant torque demands a halfshaft built to handle sudden power surges—this assembly rises to the challenge. The 25mm chrome-moly alloy steel shaft offers the ideal balance of strength and flexibility:
- Torque resistance: Its alloy composition (chromium + molybdenum) resists twisting under heavy load, ensuring efficient power transfer even during aggressive acceleration.
- Lightweight design: 15% lighter than conventional steel shafts, reducing unsprung weight to enhance suspension responsiveness and energy efficiency.
- Precision machining: Micro-polished surfaces and tight-tolerance splines eliminate backlash, preventing the "clunk" common in lower-quality alternatives during gear changes or regenerative braking.
Equipped with dual Constant Velocity (CV) joints, this assembly maintains consistent power delivery through every steering angle. Key features include:
- Heat-resistant boots: Made from tear-resistant neoprene, these boots seal in high-temperature molybdenum grease (rated to 120°C) and block out road debris, water, and salt.
- Low-friction design: The inner joint handles axial movement during suspension travel, while the outer joint accommodates steering angles up to 40°, ensuring smooth operation in tight turns.
- Longevity testing: Each joint undergoes 10,000+ rotation cycles at max load, guaranteeing reliable performance for 150,000+ km.
Designed to fit both front left and right positions, this assembly simplifies inventory and replacement. Installation is straightforward for professionals:
- Aligns with Model Y’s existing hub and drive unit flanges—no modifications needed.
- Uses OEM-spec bolts and nuts, torqued to Tesla’s recommended 245 Nm for the axle nut.
- Includes new mounting hardware to ensure a secure, vibration-free fit.
Whether replacing a worn shaft or upgrading after damage, it integrates seamlessly with your Model Y’s drivetrain.
A failing front halfshaft can cause symptoms like vibration under acceleration, clicking during turns, or uneven power distribution—all of which hurt efficiency and safety. This assembly restores:
- Smooth acceleration: Instant torque delivery without lag or shudder.
- Quiet operation: Eliminates noises from worn joints or loose splines.
- Optimal range: Efficient power transfer reduces energy waste, helping preserve battery life.
Backed by a 24-month warranty, this halfshaft undergoes rigorous testing to meet Tesla’s standards:
- Salt spray testing (500 hours) to resist corrosion in harsh climates.
- Fatigue testing (1 million+ cycles) to ensure longevity under repeated stress.
- Extreme temperature testing (-40°C to 80°C) to perform in all weather conditions.
For Model Y owners, the 1188115-99-A Front Halfshaft Assembly isn’t just a replacement part—it’s an investment in maintaining that signature Tesla driving experience: instant, smooth, and reliable. Choose precision, choose performance.
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Tesla Model Y Front Halfshaft Assembly 25mm x 565mm 1188115-99-A Images
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