The BMW 1 Series - The Most Underrated Model Ever | A Detailed Review & Analysis
Written By: BAVMODS Team
Updated: June 9, 2024
The BMW 1 Series - Small, But Mighty
When BMW launched the 1 Series, it was introduced as the entry-level model of the iconic German brand. Aimed at providing the ultimate driving experience in a compact, affordable package, the 1 Series became a perfect blend of performance, luxury, and practicality. However, among car enthusiasts, it remains one of the most under-appreciated models in BMW's lineup. This review delves into the performance, key stats, driving feel, maintenance, cost of ownership, and features of the BMW 128i, 135i, and the legendary 1M to explore why these models deserve more recognition.
The Start
The BMW 1 Series debuted in 2004 in Europe, later arriving in the U.S. in 2008. The model came in various body styles, including coupe, convertible, and hatchback (the latter not available in the U.S.). Positioned as the gateway to the BMW brand, the 1 Series offered a way for enthusiasts to experience BMW's renowned driving dynamics without breaking the bank. The model lineup featured a range of engines, from efficient four-cylinders to powerful six-cylinders, catering to different tastes and budgets.
Performance
The 1 Series features a range of engines, including the naturally aspirated N52 engine and the twin-turbocharged N54 engine. The N52, a 3.0-liter inline-six producing 230 horsepower and 200 lb-ft of torque, powers the 128i. This engine is revered for its smooth power delivery and iconic BMW straight-six sound. Paired with either a six-speed manual or a six-speed Steptronic automatic transmission, the 128i offers a pure driving experience that harks back to BMW's roots.
In contrast, the 135i is equipped with the N54 engine, a 3.0-liter twin-turbocharged inline-six that generates 306 horsepower and 295 lb-ft of torque. This engine transforms the 1 Series into a true sports car, offering blistering acceleration and ample power throughout the rev range. The N54 can be paired with either a six-speed manual or a six-speed Steptronic automatic transmission.
At the pinnacle of the 1 Series range is the BMW 1M, which shares the N54 engine with the 135i but features significant performance enhancements. Producing 335 horsepower and 332 lb-ft of torque, the 1M is a beast on the road, delivering an exhilarating driving experience. The 1M was only available with a six-speed manual transmission, emphasizing its driver-focused nature.
Maintenance / Reliability
The 1 Series has a reputation for reliability, but there are differences between the 128i, 135i, and 1M. The 128i, with its N52 engine, is known for its reliability. Common issues are relatively minor and include valve cover gasket leaks, water pump failures, and occasional issues with the VANOS (variable valve timing) system. Regular maintenance, such as oil changes, coolant flushes, and brake service, will keep the 128i running smoothly for years.
Common Issues for BMW 128i:
- Valve cover gasket replacement: $400-$600
- Water pump replacement: $800-$1,200
- VANOS repair: $500-$1,500
- Oil changes: $100-$150
- Coolant flushes: $150-$300
- Brake service: $300-$800
Pros of N52 Engine
- Smooth and linear power delivery
- Reliable and well-proven engine
- Classic BMW straight-six sound
Cons of N52 Engine:
- Less powerful compared to the turbocharged N54
- Fuel economy is decent but not exceptional
Pros of N54 Engine:
- Tremendous power and torque
- Easily tunable for more performance
- Strong performance across the rev range
Cons of N54 Engine:
- Known for high-pressure fuel pump (HPFP) issues
- Potentially higher maintenance costs due to complexity
BMW 128i:
- Engine: 3.0-liter N52 inline-six
- Power: 230 hp at 6500 rpm
- Torque: 200 lb-ft at 2750 rpm
- 0-60 mph: 6.1 seconds (manual)
- Top Speed: 150 mph (electronically limited)
- Fuel Economy: 18/28 mpg (city/highway)
- Weight: 3,208 lbs (manual)
BMW 135i:
- Engine: 3.0-liter N54 twin-turbo inline-six
- Power: 306 hp at 5800 rpm
- Torque: 295 lb-ft at 1300-5000 rpm
- 0-60 mph: 5.1 seconds (manual)
- Top Speed: 155 mph (electronically limited)
- Fuel Economy: 17/25 mpg (city/highway)
- Weight: 3,373 lbs (manual)
BMW 1M:
- Engine: 3.0-liter N54 twin-turbo inline-six
- Power: 335 hp at 5900 rpm
- Torque: 332 lb-ft at 1500-4500 rpm (369 lb-ft with overboost)
- 0-60 mph: 4.7 seconds (manual)
- Top Speed: 155 mph (electronically limited)
- Fuel Economy: 19/26 mpg (city/highway)
- Weight: 3,296 lbs
Driving Characteristics
The 1 Series is often described as the spiritual successor to the original BMW 2002. With a near-perfect 50/50 weight distribution, rear-wheel drive, and a curb weight of around 3,100 pounds, it is incredibly balanced and fun to drive. The naturally aspirated engine of the 128i provides a linear power band, making it predictable and engaging. Whether navigating tight city streets or carving up mountain roads, the 128i delivers a rewarding driving experience.
The 135i takes the driving dynamics of the 1 Series to another level. The twin-turbocharged N54 engine provides explosive acceleration and robust mid-range torque, making the 135i feel like a pocket rocket. The addition of the DSC+ (Dynamic Stability Control) system helps manage all that power, ensuring the car remains composed even during spirited driving. The 135i is a driver's car through and through, with precise steering, strong brakes, and a chassis that begs to be pushed hard.
Then there is the 1M, a true gem in BMW's lineup. The 1M's hydraulic steering offers exceptional feedback, making every drive a connected and immersive experience. The 1M's suspension setup, borrowed from the E92 M3, provides excellent handling characteristics, allowing the car to tackle corners with confidence. The 1M is a driver's car in its purest form, designed for those who crave an unfiltered driving experience.
The 135i's N54 engine, while powerful, is known for being more maintenance-intensive. Common issues include high-pressure fuel pump (HPFP) failures, turbocharger wastegate rattles, and carbon buildup on the intake valves. While these issues can be costly to address, regular maintenance and proper care can mitigate many potential problems. Despite these challenges, the performance payoff is significant for those willing to invest in the 135i's upkeep.
Common Issues for BMW 135i:
- HPFP replacement: $1,000-$1,500
- Turbocharger replacement: $2,500-$4,500
- Carbon buildup cleaning: $500-$800
- Oil changes: $100-$150
- Coolant flushes: $150-$300
- Brake service: $300-$800
The 1M, sharing the N54 engine, inherits similar maintenance challenges as the 135i. However, the 1M's limited production and collectible status often mean that owners take exceptional care of these vehicles. Regular maintenance and addressing known issues promptly will help keep the 1M in top condition.
Common Issues for BMW 1M:
- HPFP replacement: $1,000-$1,500
- Turbocharger replacement: $2,500-$4,500
- Carbon buildup cleaning: $500-$800
- Oil changes: $100-$150
- Coolant flushes: $150-$300
- Brake service: $300-$800
Cost of Ownership
The cost of ownership for the BMW 1 Series varies depending on the model and maintenance practices. The 128i tends to be less expensive to maintain due to its simpler, naturally aspirated engine. Expect to budget for regular oil changes, brake pads, and occasional repairs. The 135i, while offering superior performance, comes with higher maintenance costs. Turbocharged engines generally require more attention, and repairs for issues like HPFP failures can be costly. However, for enthusiasts who prioritize performance, the additional expense is often considered worthwhile.
BMW 128i:
- Annual Maintenance Costs: $1,000-$1,500
- Common Repairs:
- Valve cover gasket replacement: $400-$600
- Water pump replacement: $800-$1,200
- VANOS repair: $500-$1,500
BMW 135i:
- Annual Maintenance Costs:** $1,500-$2,500
- Common Repairs:
- HPFP replacement: $1,000-$1,500
- Turbocharger replacement: $2,500-$4,500
- Carbon buildup cleaning: $500-$800
BMW 1M:
- Annual Maintenance Costs: $1,500-$3,000
- Common Repairs:
- HPFP replacement: $1,000-$1,500
- Turbocharger replacement: $2,500-$4,500
- Carbon buildup cleaning: $500-$800
The 1M, given its limited production and high desirability, tends to have higher purchase prices and maintenance costs. However, its collectible status and exceptional driving experience justify the investment for many enthusiasts. The 1M has held its value remarkably well, often commanding prices higher than its original MSRP. Expect to pay around $60,000 for a well-maintained 1M, a testament to its desirability and performance.
Features
The 1 Series comes well-equipped for an entry-level luxury car, with the 128i, 135i, and 1M offering different levels of features and options:
BMW 128i:
- Standard features include leatherette upholstery, dual-zone automatic climate control, 10-speaker sound system, and 17-inch alloy wheels.
- Optional features include the Premium Package (leather upholstery, sunroof, power front seats), heated seats and steering wheel, and xenon headlights.
BMW 135i:
- Builds on the 128i's features with additional performance-oriented options such as the M Sport Package (sport seats, M steering wheel, aerodynamic kit), upgraded brakes and suspension components, 18-inch alloy wheels, and a premium audio system.
BMW 1M:
- Focuses on performance with minimal frills. Features include sports seats with orange stitching, a six-speed manual transmission, and a simplified interior with essential controls. The 1M emphasizes driving pleasure over luxury, offering a raw and engaging experience.
Conclusion
The BMW 1 Series, particularly the 128i, 135i, and 1M, epitomizes the essence of BMW's commitment to crafting vehicles that deliver an exhilarating driving experience, luxury, and practicality in a compact form. While often overshadowed by its more prominent siblings in the BMW lineup, the 1 Series stands out as a hidden gem in the automotive world, offering unique attributes that appeal to a wide range of driving enthusiasts.
The 128i, with its reliable N52 engine, offers a balanced blend of performance and everyday usability. Its straightforward maintenance requirements and robust build make it an excellent choice for those seeking an entry-level BMW without sacrificing the quintessential driving dynamics that the brand is known for. The 128i's combination of a smooth, naturally aspirated inline-six engine and rear-wheel drive layout ensures a pure and engaging driving experience that is becoming increasingly rare in modern cars.
The 135i, powered by the potent N54 engine, takes performance to the next level. Its turbocharged inline-six delivers a thrilling burst of power and torque, making it a formidable contender in the compact sports car segment. Although the 135i requires more meticulous maintenance, its ability to deliver exhilarating acceleration and dynamic handling is a testament to BMW's engineering prowess. For enthusiasts who prioritize performance and are willing to invest in upkeep, the 135i offers an unparalleled driving experience.
The 1M, a limited-production masterpiece, embodies the pinnacle of the 1 Series lineup. With its muscular stance, enhanced suspension, and powerful N54 engine, the 1M is a modern classic that has earned a cult following. Its rarity and performance capabilities make it a highly sought-after collector's item, and its value continues to appreciate. The 1M's raw and unfiltered driving experience, combined with its simplicity and focus on driver engagement, harks back to the golden era of BMW's M division.
Despite their varying characteristics, all three models share the core values that define BMW: precision engineering, driver-centric design, and a relentless pursuit of driving pleasure. The 1 Series encapsulates these values in a compact package, making it a compelling choice for those who seek an authentic BMW experience without the need for a larger, more expensive model.
In an era where cars are becoming increasingly complex and laden with technology, the 1 Series offers a refreshing reminder of what makes driving truly enjoyable. Its direct steering, balanced chassis, and responsive powertrains create a connection between driver and machine that is increasingly rare in today's automotive landscape.
Ultimately, the BMW 1 Series is a testament to the brand's ability to create vehicles that resonate with driving enthusiasts. Whether you choose the reliable and accessible 128i, the thrilling and powerful 135i, or the iconic and collectible 1M, each model delivers a unique and rewarding driving experience. Despite being underappreciated by some, the 1 Series remains a cherished choice for those who understand and appreciate the art of driving.