1. Sunroof, Convertible & Hardtop Auto Parts For Sale
  2. sku: 15746772761302853
  3. AUDI A8-AUDI

AUDI 640.AU1T15 Rv Lid Motor Down

fits make: Audi. year: 1999–2015.

640.au1t15 Audi Misc Rv 1999 Lid Motor Pull Down 8983515

( Model: A8-AUDI ), ( Part Type: Lid Motor Down ), ( Conditions Options: Lid/gate Motor ), ( Genuine Oem: Yes ), ( Ipn: 640.au1t15 ), ( Warranty: 1 Year )

Review AUDI Misc Rv Lid Motor Pull Down fits 1999–2015

The **Audi 640.au1t15 RV (1999) Lid Motor Down** is a specialized, high-performance component designed for Audi s iconic 6-cylinder, 2.8-liter (2793cc) **AU1T15** engine, commonly found in models like the **Audi A6 (C4), A8 (B5), and S6 (C4)**, as well as the **Audi V8 (4.2L) in its early iterations**. This particular **lid motor** also referred to as a **valve cover motor** or **valve cover actuator** is responsible for the smooth and precise opening and closing of the engine s valve cover, a critical function that ensures proper sealing, oil containment, and optimal engine performance. The **1999 RV variant** of this motor is engineered with **Audi s proprietary precision engineering**, featuring a **robust, corrosion-resistant design** built to withstand the demanding conditions of high-performance driving, extended high-speed cruising, and the thermal stresses of modern automotive engines.

What sets this **AU1T15 RV lid motor** apart is its **sealed, maintenance-free construction**, eliminating the need for frequent lubrication or adjustments a hallmark of Audi s commitment to durability and reliability. The motor operates via a **gear-driven mechanism**, ensuring smooth and silent engagement with the valve cover s locking mechanism, preventing leaks and maintaining consistent pressure within the engine bay. This component is particularly vital in **high-revving applications**, where the valve cover must remain securely latched under intense G-forces and rapid temperature fluctuations. The **1999 model year** often incorporates subtle refinements in material composition and sealing technology, enhancing its resistance to oil degradation and environmental contaminants, which is crucial for vehicles operating in diverse climates or exposed to road salt and humidity.

For enthusiasts and mechanics working on **AU1T15-powered Audi vehicles**, this lid motor is a **must-have replacement part** when addressing issues such as **stuck valve covers, oil leaks, or failure of the original motor s internal mechanism**. The **RV designation** may also indicate a **revised or updated version** of the motor, potentially featuring improved sealing gaskets or a more robust spring mechanism to counteract wear over time. When installed, this motor integrates seamlessly with the engine s **oil pressure system**, ensuring that the valve cover remains securely engaged without compromising the engine s overall functionality. Whether used in a **restoration project, performance upgrade, or routine maintenance**, this **Audi 640.au1t15 RV (1999) Lid Motor Down** exemplifies the brand s dedication to **precision, longevity, and engineering excellence**, making it an indispensable component for any Audi owner seeking to maintain or enhance their vehicle s performance.

### **Pros and Cons of Buying a 1999 Audi 640 AU1T15 RV (Lift Kit Installed, Rear Motor Down)**

#### **Pros:**

1. **Classic Audi Performance** The 640 AU1T15 is a naturally aspirated, high-revving engine known for its smooth power delivery and classic Audi sound. It produces around 220 240 hp (depending on tuning) and revs enthusiastically up to 7,500 RPM, making it enjoyable for driving enthusiasts.

2. **Reliability (for its age)** Audi s early 2000s engines, especially the 1.8T and 2.0T variants, are generally robust if well-maintained. The AU1T15 is a later iteration of the 1.8T engine, which improved on earlier reliability issues. With proper maintenance, it can last well beyond 200,000 miles.

3. **Aftermarket Support** The 1.8T/AU1T15 has a strong aftermarket presence, with readily available parts for upgrades (turbo kits, intercoolers, exhausts) and tuning options (Bosch, Haltech, or standalone ECU tuning). This makes it easier to modify and improve performance.

4. **Lift Kit Potential** The fact that this car already has a lift kit installed suggests the owner was willing to invest in modifications. If the lift kit is properly installed (with upgraded suspension, wheels, and tires), it can improve handling and aesthetics. However, ensure the lift is not excessive (more than 2 3 inches) to avoid long-term suspension wear.

5. **Driving Experience** The 640 s short wheelbase and precise steering make it fun to drive, especially on twisty roads. The manual transmission (if available) enhances engagement, while the automatic (if present) is smooth for daily use.

6. **Resale Value (for enthusiasts)** While not a high-value car in the general market, Audi 640s with well-documented histories and modifications hold appeal among tuning communities. A properly maintained example can still fetch a decent price among collectors.

7. **Aesthetic Appeal** The 640 s aggressive stance (especially with a lift kit) and retro-futuristic design make it stand out. Many owners appreciate its unique look, which sets it apart from modern cars.

---

#### **Cons:**

1. **Aging Transmission (If Automatic)** Many early 2000s Audis, including the 640, came with the ZF 5HP19 automatic transmission, which is known for being finicky. Common issues include delayed engagement, rough shifting, and failure of the torque converter. If the transmission has been neglected, repairs can be costly.

2. **Turbocharger Reliability** The AU1T15 is a turbocharged engine, and turbo failures (wastegate seals, bearings, or oil leaks) are a known issue, especially if the car has high mileage or was driven aggressively. Regular turbo inspections and oil changes are critical.

3. **Suspension Wear (Due to Lift Kit)** Lift kits can accelerate wear on bushings, control arms, and sway bars. If the lift kit was not installed properly or the suspension components were not upgraded, the car may suffer from excessive body roll, uneven tire wear, or handling issues.

4. **Electrical Gremlins** Audi s early 2000s models are notorious for electrical problems, including faulty sensors, wiring harness issues, and computer glitches. The 640 is no exception, and diagnosing electrical faults can be time-consuming and expensive.

5. **Fuel Economy** The 1.8T/AU1T15 is not fuel-efficient by modern standards, averaging around **18 22 MPG combined**. With a lift kit and potential power upgrades, efficiency may drop further.

6. **Maintenance Costs** Audi parts and labor can be expensive, especially for specialized components like the turbo, intercooler, or transmission. Regular maintenance (valve adjustments, timing belt, oil changes) is essential but adds up over time.

7. **Rust Concerns** Depending on the car s history, rust (especially in the wheel wells, subframe, or sills) can be a hidden issue. A thorough inspection is necessary before purchase.

8. **Depreciation** The 640 is not a high-value car, and its resale depreciates quickly compared to modern performance cars or even older Audis in better condition.

9. **Potential Modification Risks** If the car has been heavily modified (especially with aftermarket turbos or forced induction), it may have reliability concerns. Ensure any modifications were done by a reputable shop and that the engine is still running within safe parameters.

10. **Rear Motor Down (Potential Issues)** If the "rear motor down" refers to a rear-wheel-drive conversion or a specific modification (such as a lowered rear end), ensure it was done correctly. Improper modifications can lead to drivability issues, tire wear, or even safety concerns.

---

### **Ending Conclusion:**

A **1999 Audi 640 AU1T15 RV with a lift kit and rear motor down** can be an exciting and rewarding purchase for the right buyer particularly someone who appreciates classic Audi performance, enjoys tinkering with modifications, and is prepared for potential maintenance challenges. It offers a unique blend of retro styling, tunability, and driving dynamics that modern cars often lack.

However, it is **not a plug-and-play vehicle**. Buyers must be willing to invest time and money in:

- **Thorough pre-purchase inspection** (transmission, turbo, suspension, electrical system).

- **Regular maintenance** (oil changes, valve adjustments, turbo care).

- **Potential repairs** (transmission issues, electrical gremlins, suspension wear from the lift kit).

If you are an **enthusiast who enjoys working on cars, prioritizes fun over practicality, and can afford the maintenance costs**, this Audi could be a fantastic project. If you are looking for a **reliable daily driver with low ownership costs**, this is not the right choice.

---

### **Recommendation:** **Buy only if:**

You have **mechanical experience** or access to a trusted mechanic.

The car has **full service records** (especially turbo, transmission, and suspension).

A **pre-purchase inspection (PPI) confirms** no major hidden issues.

You are **prepared for unexpected repairs** (transmission, turbo, electrical).

You **enjoy modifying and maintaining** performance cars.

**Avoid if:**

You need a **reliable, low-maintenance daily driver**.

You are **uncomfortable with mechanical work** or high repair costs.

The car lacks **documentation** or has **unknown modification history**.

You prioritize **fuel efficiency, practicality, or long-term value** over driving fun.

**Final Verdict:**

This Audi is a **fantastic project car for the right owner**, but it is **not a beginner-friendly or hassle-free purchase**. If you are serious about it, **inspect it thoroughly, budget for potential repairs, and enjoy the process** because a well-loved 640 can be one of the most rewarding cars to own.

Details:

Easy to find parts that don't require a mechanics knowledge. Please compare part numbers BEFORE purchasing. Please disregard other fitment charts they may not be correct. Free shipping only applies to items you keep.

Model: A8 AUDI. Quality, Assured Parts All are Quality Tested Inspected. Shipping Damage:: Damages and evidence of tampering on the outer packaging must be noted delivery receipt by driver. More Parts: 1 Year Warranty.

Image shown may be the vehicle from which part was pulled, or a generic image representing typical stock, rather than unique item being sold. Warranty HASSLE-FREE 1 YEAR WARRANTY: All parts are warrantied for a period of 12 months or year from the purchase date. MISC RV 1999 Lid Motor Pull Down 8983515: LID/GATE MOTOR Included: Hassle-free 1 Year Warranty Our Part #: 8983515. Very happy customer, excellent value and service.

If something is wrong with an order, we certainly do want to help you.

part #: 640.au1t15 price

  • $125.00

specifications sunroofconverti:

  • for makes: Audi
  • for years: 1999-2015
  • model: A8-audi
  • part type: Lid Motor Down
  • conditions options: Lid/gate Motor
  • genuine oem: Yes
  • ipn: 640.au1t15
  • warranty: 1 Year

returns sunroofconverti:

  • policy: Returns Accepted
  • time: 60 Days
  • paid by: Buyer

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offer sunroofconverti:

  • availability: In Stock
  • quantity: 1
  • started: February 9, 2026
  • best offers: True
  • sold: 0
  • options: Ship-to-home

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  • # reviews: 22894
  • rating: 97.1%
  • city: Rancho Cordova, California

shipping sunroofconverti:

  • class: Freight
  • type: Fixed
  • service: Flat Rate Freight
  • cost: $25.00

general sunroofconverti:

  • Exterior Parts Accessories > Roofs, Tops Sunroofs > Sunroofs Parts
  • condition: Used
for makes: audi, for years: 1999-2015, part type: lid motor down, conditions options: lid/gate motor, genuine oem: yes, warranty: 1 year,
manufacturer: audi, category: auto parts > exterior parts accessories > roofs, tops sunroofs > sunroofs parts, sku: 15746772761302853,
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  • Used. Offer #1 priced at $125.00 + $25.00 shipping estimate = $150.00* total. *OPEN FOR IMPORTANT FITMENT INFO*.+$25.00 shipping

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