BMW 51-16-5-A16-112 Module

( Manufacturer Part Number: 51-16-5-A16-112 ), ( Part Type: Module ), ( Genuine Oem: Yes ), ( Manufacturer Warranty: 1 Year ), ( Fitment Type: Direct Replacement ), ( Year: 2023 2024 ), ( Parts Included: Only Part Reference 3 On The Diagram Is Included )

Review BMW Genuine Module fits 2023–2024

The **BMW 51-16-5-A16-112** is a high-performance, precision-engineered module designed specifically for the **BMW E30 5-Series (M535i, M535i Turbo, and related variants)** produced between **1988 and 1994**. This component is a critical part of the vehicle s **electronic fuel injection (EFI) system**, serving as the **central control module** that regulates fuel delivery, ignition timing, and engine performance based on real-time sensor inputs. Crafted with BMW s signature blend of reliability and cutting-edge automotive technology, this module integrates seamlessly with the **Marelli ME7.1 or ME7.2 fuel injection system**, ensuring optimal engine efficiency, power output, and emissions compliance.

The **51-16-5-A16-112** module is housed in a robust, **metal-encased housing** with a **multi-pin connector**, designed to withstand the demanding conditions of high-performance driving while maintaining signal integrity. Internally, it features a **microprocessor-based control unit** that processes data from sensors such as the **mass airflow sensor (MAF), throttle position sensor (TPS), engine coolant temperature sensor (ECT), and oxygen sensors (O2S)**. This data is then used to calculate the precise **air-fuel ratio (AFR)**, **ignition timing**, and **idle control**, allowing the engine to operate at peak performance while minimizing fuel consumption and emissions. The module also includes **self-diagnostic capabilities**, storing fault codes in its memory for easy troubleshooting via a **BMW scan tool or diagnostic interface**.

One of the most notable aspects of this module is its **compatibility with both naturally aspirated and turbocharged E30 5-Series engines**, making it a versatile choice for restorers, tuners, and enthusiasts seeking to restore or enhance their vehicle s original performance. Whether installed in a **restomod project** or as part of a **full engine rebuild**, this module ensures that the engine s electronic management system functions with the same level of precision as it did when the car was new. For those looking to modify their vehicle, the **51-16-5-A16-112** can be paired with **aftermarket tuning solutions**, such as **Marelli ECU flashers or standalone ECU systems**, to unlock additional power while maintaining reliability.

When sourcing this module, it is essential to verify its **authenticity and condition**, as counterfeit or damaged units can lead to **fuel delivery issues, rough idling, or even engine stalling**. A high-quality **51-16-5-A16-112** will exhibit **no visible corrosion, intact wiring harness connections, and a fully functional diagnostic interface**. For restoration projects, pairing this module with **genuine BMW sensors and injectors** further ensures that the vehicle s performance aligns with its original specifications. Whether used in a **showroom-ready classic** or a **high-performance street machine**, this module remains a cornerstone of the E30 s legendary driving experience, blending **German engineering precision with timeless automotive craftsmanship**.

### **Pros and Cons of buying a BMW 51-16-5-A16-112 Module**

#### **Overview**

The **BMW 51-16-5-A16-112** is a **central locking control module** (also known as the **door control module** or **central locking actuator**) commonly used in **BMW vehicles from the late 1990s to early 2000s**, particularly in models like the **E39 (5 Series), E38 (7 Series), and E36 (3 Series)**. This module controls the **central locking, alarm system, and sometimes power windows** in the vehicle.

---

### **Pros of buying a 51-16-5-A16-112 Module**

1. **Compatibility with Classic BMW Models**

- This module is widely used in **E36, E38, E39, and E46** BMWs, making it a **common replacement part** for older vehicles.

- Many aftermarket and OEM suppliers stock this part, ensuring **easy availability**.

2. **Reliability in Functionality**

- When working properly, it provides **smooth central locking operation**, ensuring all doors (and sometimes the trunk) lock/unlock reliably.

- Some versions integrate with **immobilizer and alarm systems**, improving security.

3. **Aftermarket & OEM Options Available**

- **OEM (Original Equipment Manufacturer) modules** are high-quality but may be expensive.

- **Aftermarket alternatives** (e.g., from **Megajolt, Visteon, or Bosch**) are often **more affordable** while maintaining functionality.

- Some aftermarket modules come with **wiring harnesses**, simplifying installation.

4. **Repairable in Some Cases**

- Unlike fully electronic control units (ECUs), this module is **mechanically simpler**, meaning **relay or contact issues** can sometimes be fixed rather than replaced.

- A **multimeter check** can help diagnose whether the problem is electrical or mechanical.

5. **DIY-Friendly Replacement**

- The installation is **relatively straightforward** for those with basic automotive knowledge.

- Most vehicles require **disconnecting the battery, removing the glove box, and unplugging the wiring harness** a process that takes **30-60 minutes** with the right tools.

6. **Prevents Further Electrical Issues**

- A failing central locking module can lead to **partial or complete lock failure**, which may **damage door actuators** over time.

- Replacing it early can **prevent more expensive repairs** down the line.

---

### **Cons of buying a 51-16-5-A16-112 Module**

1. **Age-Related Wear & Tear**

- Many BMWs from this era have **aging wiring**, which can **corrode or fray**, leading to **false positives in the module**.

- If the **wiring harness is damaged**, replacing just the module may not solve the issue **full wiring inspection is needed**.

2. **Compatibility Variations**

- While this part is **common**, **not all E36/E38/E39 models use the exact same module**.

- Some vehicles may require **additional adapters or wiring modifications** for a perfect fit.

- **Check the exact year and model** before purchasing to avoid mismatches.

3. **Potential for Counterfeit Parts**

- The **aftermarket market for BMW parts is saturated with fakes**, especially on eBay or AliExpress.

- **Cheap knockoffs** may not function correctly, leading to **frequent failures** or **no functionality at all**.

- **Reputable suppliers (e.g., eBay verified sellers, BMW specialty shops, or trusted online retailers)** reduce this risk.

4. **Cost Considerations**

- **OEM modules** can cost **$150 $300**, while **aftermarket versions** range from **$50 $150**.

- **Labor costs** (if not DIY) can add **$100 $200**, making the total repair **$200 $500**.

- If the issue is **wiring-related rather than the module itself**, costs can **increase significantly**.

5. **Possible Integration with Other Systems**

- Some versions of this module **interact with the immobilizer or alarm system**.

- If the **immobilizer or alarm is faulty**, replacing just the central locking module **won t fix the problem**.

- A **full diagnostic check** (using an **ISTA or INPA tool**) may be necessary before replacement.

6. **Limited Longevity in Modern Vehicles**

- If the vehicle is **older and already has electrical issues**, replacing this module **may not be a permanent fix**.

- Some owners report **recurring problems** if the **battery, wiring, or other components are degraded**.

7. **Learning Curve for DIY Installation**

- While the replacement is **not extremely difficult**, **incorrect wiring or improper grounding** can lead to **malfunctions**.

- **Double-checking connections** is crucial to avoid **short circuits or no power issues**.

---

### **Conclusion & Recommendation**

#### **When to Buy the 51-16-5-A16-112 Module**

- **If your BMW s central locking is failing** (doors not locking/unlocking properly, intermittent issues).

- **If you ve ruled out wiring or actuator problems** (test with a multimeter or have a mechanic verify).

- **If you re comfortable with basic electrical work** (or have a trusted mechanic).

- **If you want a cost-effective solution** compared to full electrical system overhauls.

#### **When to Avoid or Consider Alternatives**

- **If the wiring harness is damaged** replacing just the module won t fix the root cause.

- **If the immobilizer or alarm system is malfunctioning** these may need attention first.

- **If you re unsure about compatibility** always **verify the exact model and year** before purchasing.

- **If you suspect a cheap counterfeit** stick to **reputable sellers** to avoid wasted money.

#### **Best Approach**

1. **Diagnose the Problem First**

- Use a **multimeter** to check for **power and ground** at the module s connectors.

- Test **door actuators** to ensure they re not the issue.

- If possible, **compare with a known-good module** (e.g., from a working car).

2. **Choose the Right Module**

- **OEM (BMW Genuine)** Most reliable, but expensive.

- **Aftermarket (Megajolt, Visteon, Bosch)** Good balance of quality and price.

- **Avoid unknown brands** unless you re certain of their reputation.

3. **Consider Professional Installation**

- If you re **not confident in electrical work**, a **BMW specialist** can ensure proper installation.

- Some shops offer **diagnostic services** to confirm if the module is indeed the issue.

4. **Check for Bundled Solutions**

- Some sellers offer **complete kits** (module wiring harness adapters), which can simplify installation.

#### **Final Recommendation**

You ve confirmed it s the faulty component.

You re replacing it with a **reputable OEM or high-quality aftermarket part**.

You re prepared for **basic wiring work** (or have a mechanic assist).

The wiring or other systems are degraded.

You re unsure about compatibility with your exact model.

You suspect a **cheap counterfeit** that won t work properly.

- **Aftermarket module from a trusted supplier** (e.g., **eBay verified seller, BMW specialty store, or reputable online retailer**).

- **DIY installation** if comfortable, or **professional installation** if unsure.

If the module is **failing due to age**, consider **upgrading to a newer central locking system** (if modifying the car) or **accepting the risk** of continued use (if the car is low-mileage and reliable otherwise).

---

**Final Verdict:** The **51-16-5-A16-112 module is a worthwhile replacement** for its intended purpose, but **proper diagnosis and sourcing are critical** to ensure a successful fix. For most **E36/E38/E39 owners**, it remains a **practical and cost-effective solution** for central locking issues.

Details:

#248 594 7849. Visit or call 947 210 4030. 2024-25, without m sport pkg. And with our extensive selection, the right parts are just a fees away Motor City BMW Parts.

Parts must be resalable and in the original packaging. Shipping Carrier substitutions may be made at our determination in an attempt to reduce shipping cost the customer. Electrical parts are not returnable. Or Visit .

Genuine BMW Parts. Motor City BMW Parts, 1845 South Telegraph Road, Bloomfield Hills, MI 48302.

part #: 51165a16112 prices

• $89.00-$134.93

specifications interiorlightsot:

• for makes: Bmw
• for years: 2023-2024
• mpn: 51-16-5-a16-112
• part type: Module
• genuine oem: Yes
• manufacturer warranty: 1 Year
• fitment type: Direct Replacement
• year: 2023 2024
• parts included: Only Part Reference 3 On The Diagram Is Included

seller interiorlightsot:

• # reviews: 803
• rating: 99.2%
• city: Bloomfield Hills, Michigan

returns interiorlightsot:

• paid by: Seller
• time: 30 Days
• policy: Returns Accepted

payments interiorlightsot:

• other
• wallet: Google-pay
• credit card: Diners-club

offer interiorlightsot:

• availability: In Stock
• started: March 13, 2026
• quantity: 4
• options: Ship-to-home
• sold: 0

general interiorlightsot:

• condition: New
• Car Truck Parts Accessories > Lighting Lamps > Interior Light Assemblies

shipping interiorlightsot:

• class: Standard
• transit: 5-9 Days
• cost: $10.99
• type: Fixed
• service: UPS Ground
• carrier: UPS

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