MY99 is for 1999 and older Defenders and MY99 is for 2000 and newer Defenders. Td5 engine In 1998, the Defender was fitted with an all-new 2.5-litre, five-cylinder in-line turbodiesel engine, badged the Td5. The Tdi could not meet upcoming Euro III emissions regulations so the Td5 replaced the Tdi as the only available power unit. The engine used electronic control systems and produced at 4850 rpm, more than the Tdi, with improved refinement. Traditionalists were critical of the electronic systems deployed throughout the vehicle, but concerns that these would fail when used in extreme conditions proved unfounded. For the 2002 model year, further refinements were made to the Td5 engine to help it achieve ever-more stringent emission regulations. The "XS" 4x4 was introduced in 2002 as a top-specification level and the "County" package could be applied to every model in the line-up. XS models come with many "luxury" features, such as heated windscreen, heated seats, air conditioning, ABS and traction control and part-leather seats. At the same time other detail improvements were made including a dash centre console, improved instrument illumination and the availability of front electric windows for the first time on a Defender. The design faults of the two-piece rear 4x4 door were finally eradicated with a one-piece door featuring a rubber weather sealing strip for the rear window. 2007 model From Spring 2007 a series of changes were made to the Defender, most of which were implemented to meet emissions and safety legislation. The biggest change was to the drivetrain. The Td5 engine was replaced by an engine from Ford's DuraTorq line (AKA the Puma engine), built in their factory in Dagenham, making the Td5 the last Land Rover engine to be built in-house at Solihull. The engine chosen was from the ZSD family, being a version of the 2.4-litre four-cylinder unit also used in the highly successful Ford Transit. The engine's lubrication and sealing system was adapted for use in wet, dusty conditions and to maintain lubrication at extreme angles in off-road use. The power level remains the same at , but with a lower power peak speed for towing and better acceleration. Torque output rose from to due to the fitting of a variable-geometry turbocharger. This produces a wider spread of torque than the Td5, from 1500 rpm to 2000 rpm. The engine is mated to a new six-speed gearbox. First gear is lower