2013-2016 BMW Z4 (E89 LCI facelift ) 35is (340 Hp) sDrive DCT

The BMW Z4 (E89) 35is, produced from 2013 to 2016, represented the performance pinnacle of the E89 Z4 Roadster generation following the LCI (Life Cycle Impulse) facelift. Positioned as the range-topping model, the 35is offered a significant power upgrade over the standard Z4 variants, targeting drivers seeking a more engaging and dynamic driving experience. It built upon the foundation of the E89 platform, which itself was a return to BMW’s traditional two-seat roadster roots after a hiatus following the Z3 and Z8. The “is” designation, historically used by BMW to denote performance-oriented models, signified a substantial increase in horsepower and torque, coupled with subtle but effective chassis and aesthetic enhancements.

Technical Specifications

INTRODUCTION

The Z4 E89 35is was produced between 2013 and 2016, representing the final iteration of the E89 generation before being replaced by the G29 Z4. It sat at the top of the E89 Z4 lineup, offering a substantial performance increase over the 28i and 30i models. The 35is was exclusively offered with rear-wheel drive and the seven-speed M-DCT dual-clutch transmission, emphasizing its sporting intentions. The E89 Z4, in general, aimed to recapture the spirit of classic BMW roadsters, offering a blend of performance, handling, and open-air driving enjoyment.

Powertrain & Engine Architecture

The heart of the 35is is the N54B30A 3.0-liter inline-six engine. This engine, while based on the earlier N54 design, received several enhancements for the 35is, including revised engine management software and improved cooling. The N54 is renowned for its responsiveness and tunability, thanks to its twin-turbocharger setup. The twin-turbo system utilizes a smaller turbocharger for quick spool-up and minimal turbo lag, complemented by a larger turbocharger for high-end power delivery. Direct fuel injection ensures precise fuel metering and efficient combustion. The engine produces 340 horsepower at 5900 rpm and 450 Nm (331.9 lb-ft) of torque from as low as 1500 rpm.

The seven-speed M-DCT dual-clutch transmission is a crucial component of the 35is’s performance. This transmission offers incredibly fast and precise gear changes, both in automatic and manual modes. Drivers can select from various driving modes, including Drive, Sport, and Sport+, each altering the transmission’s shift points and responsiveness. Paddle shifters mounted on the steering wheel allow for manual gear selection, providing greater driver control.

Driving Characteristics

The Z4 35is delivers a thrilling driving experience. The combination of the potent N54 engine and the quick-shifting M-DCT transmission results in impressive acceleration – 0 to 60 mph in approximately 4.6 seconds. The readily available torque makes for effortless overtaking and strong in-gear acceleration. Compared to the naturally aspirated Z4 30i, the 35is offers a significantly more muscular and responsive feel. While the 30i provided a smooth and refined driving experience, the 35is prioritizes performance and engagement. The M-DCT transmission contributes to a more direct and connected feel, enhancing the overall driving experience. The suspension, tuned for a balance of comfort and handling, provides a firm but controlled ride.

Equipment & Trim Levels

The 35is came standard with a comprehensive list of features, befitting its position as the flagship model. Standard equipment included leather upholstery, power-adjustable seats with memory function, automatic climate control, a premium sound system, and BMW’s iDrive infotainment system. Exterior features included unique aerodynamic styling elements, such as a revised front bumper, side skirts, and rear diffuser. Optional extras included features like navigation, heated seats, a retractable hardtop (standard on most models), and various interior trim options. The interior generally featured aluminum trim accents and sport seats designed to provide enhanced lateral support.

Chassis & Braking

The Z4 35is utilizes a double-wishbone front suspension and an independent multi-link rear suspension, providing excellent handling and ride quality. The suspension components were specifically tuned to complement the increased power output of the 35is. Braking duties are handled by ventilated discs at all four corners, providing ample stopping power. The standard ABS (Anti-lock Braking System) and stability control systems enhance safety and control. The steering is a rack-and-pinion system with electric power assistance, offering precise and responsive steering feel.

Market Reception & Comparison

The Z4 35is was generally well-received by automotive critics. Reviewers praised its powerful engine, quick transmission, and engaging handling. Compared to the Z4 28i and 30i, the 35is offered a significant performance upgrade, but at a higher price point. Fuel economy, while respectable for a performance roadster, was lower than the base models. Reliability was generally good, although the N54 engine is known to require diligent maintenance, particularly regarding the cooling system and fuel injectors. Compared to rivals like the Porsche Boxster and Mercedes-Benz SLK, the Z4 35is offered a compelling combination of performance, features, and value.

Legacy

The Z4 E89 35is remains a desirable roadster in the used car market. Its potent engine and engaging driving dynamics continue to appeal to enthusiasts. The N54 engine, while requiring regular maintenance, is known for its tunability and potential for increased power output. Well-maintained examples of the 35is command a premium over the lower-trim Z4 models. The E89 Z4, and particularly the 35is, represents a return to form for BMW roadsters, offering a compelling blend of performance, style, and open-air driving enjoyment.